WorldWideScience

Sample records for beauty mesons

  1. Beauty Meson Decays To Charmonium

    CERN Document Server

    Ershov, A V

    2001-01-01

    We study decays of beauty (B) mesons into the final states containing charmonium mesons. The data were collected by the CLEO experiment at the Cornell Electron Storage Ring from 1990 to 1999. First, we describe a technique that significantly improves the reconstruction efficiency for decays of J/ y and y (2S) mesons into a pair of leptons. This reconstruction method is used in all the analyses presented in this dissertation. Then we present a study of B decays to the χc 1 and χc2 charmonium states and compare our results with the predictions of different theoretical models of charmonium production. After that we report the first observation of the decay B → J/ y &phis;K, which is the first B meson decay requiring a creation of an additional ss¯ quark pair. Then we measure the B0 and B+ meson masses from B0 → y (′) K0S and B+ → y (′) K+ decays. The method employed eliminates the dominant systematic uncertainty associated w...

  2. Beauty meson decays to charmonium

    Science.gov (United States)

    Ershov, Alexey Valerievich

    2001-10-01

    We study decays of beauty (B) mesons into the final states containing charmonium mesons. The data were collected by the CLEO experiment at the Cornell Electron Storage Ring from 1990 to 1999. First, we describe a technique that significantly improves the reconstruction efficiency for decays of J/ y and y (2S) mesons into a pair of leptons. This reconstruction method is used in all the analyses presented in this dissertation. Then we present a study of B decays to the χc 1 and χc2 charmonium states and compare our results with the predictions of different theoretical models of charmonium production. After that we report the first observation of the decay B --> J/ y φK, which is the first B meson decay requiring a creation of an additional ss¯ quark pair. Then we measure the B0 and B+ meson masses from B0 --> y (') K0S and B+ --> y (') K+ decays. The method employed eliminates the dominant systematic uncertainty associated with the previous B meson mass measurements at the e+e- colliders and results in a significant improvement in precision. After that we present a study of three B0 decay modes useful for time-dependent CP asymmetry measurements. In this study we reconstruct B0 --> J/ y K0S , B0 --> χc 1 K0S , and B0 --> J/ y π0 decays. The latter two decay modes are observed for the first time. We describe a K0S --> π0π0 detection technique and its application to the reconstruction of the decay B 0 --> J/ y K0S . Then we present a sensitivity study for the measurement of the mixing-induced CP violation in the neutral B meson system (parameter sin 2β) at CLEO using the method that requires a measurement of the decay time of only one meson in a B0overline B0 pair. Finally, we search for direct CP violation in decays B+/- --> J/ y K+/- and B +/- --> y (2S) K+/- . The results of this search are consistent with the Standard Model expectations and provide the first experimental test of the assumption that direct CP violation is negligible in B --> y (') K decays.

  3. Beautiful mesons from QCD spectral sum rules

    Energy Technology Data Exchange (ETDEWEB)

    Narison, S. (OPM, Univ. Montpellier 2, 34 (France))

    1991-08-01

    We discuss the beautiful meson from the point of view of the QCD spectral sum rules (QSSR). The bottom quark mass and the mixed light quark-gluon condensates are determined quite accurately. The decay constant f{sub B} is estimated and we present some arguments supporting this result. The decay constants and the masses of the other members of the beautiful meson family are predicted. (orig.).

  4. Beautiful mesons from QCD spectral sum rules

    Energy Technology Data Exchange (ETDEWEB)

    Narison, S.

    1988-08-18

    We apply q/sup 2/ = 0 moments within n (number of derivatives) and t/sub c/ (continuum threshold) stability criteria to the beautiful-meson systems. The optimal predictions are reached for the same ranges of n and t/sub c/ values leading to the previous estimate of the decay constant f/sub B/. The QCD scales (b-quark 'physical' mass, mixed and four-quark condensates) are strongly constrained by the observed B and B/sup */ masses. The predictions for the S- and P-state splittings are much affected by the definition of the b-quark mass (pole or euclidian) entering into the Wilson coefficients of the non-perturbative condensates. The size of the SU(3)/sub F/ breaking on the mass splittings cannot be accurately predicted due to the imprecise value of the / condensate ratio. We present new predictions for the B/sub c/ and B/sub c//sup */ mesons.

  5. Beauty vector meson decay constants from QCD sum rules

    Energy Technology Data Exchange (ETDEWEB)

    Lucha, Wolfgang [Institute for High Energy Physics, Austrian Academy of Sciences, Nikolsdorfergasse 18, A-1050 Vienna (Austria); Melikhov, Dmitri [Institute for High Energy Physics, Austrian Academy of Sciences, Nikolsdorfergasse 18, A-1050 Vienna (Austria); D. V. Skobeltsyn Institute of Nuclear Physics, M. V. Lomonosov Moscow State University, 119991, Moscow (Russian Federation); Simula, Silvano [Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, Via della Vasca Navale 84, I-00146, Roma (Italy)

    2016-01-22

    We present the outcomes of a very recent investigation of the decay constants of nonstrange and strange heavy-light beauty vector mesons, with special emphasis on the ratio of any such decay constant to the decay constant of the corresponding pseudoscalar meson, by means of Borel-transformed QCD sum rules. Our results suggest that both these ratios are below unity.

  6. Beauty Vector Meson Decay Constants from QCD Sum Rules

    CERN Document Server

    Lucha, Wolfgang; Simula, Silvano

    2016-01-01

    We present the outcomes of a very recent investigation of the decay constants of nonstrange and strange heavy-light beauty vector mesons, with special emphasis on the ratio of any such decay constant to the decay constant of the corresponding pseudoscalar meson, by means of Borel-transformed QCD sum rules. Our results suggest that both these ratios are below unity.

  7. Beauty vector meson decay constants from QCD sum rules

    International Nuclear Information System (INIS)

    We present the outcomes of a very recent investigation of the decay constants of nonstrange and strange heavy-light beauty vector mesons, with special emphasis on the ratio of any such decay constant to the decay constant of the corresponding pseudoscalar meson, by means of Borel-transformed QCD sum rules. Our results suggest that both these ratios are below unity

  8. Beauty vector meson decay constants from QCD sum rules

    Science.gov (United States)

    Lucha, Wolfgang; Melikhov, Dmitri; Simula, Silvano

    2016-01-01

    We present the outcomes of a very recent investigation of the decay constants of nonstrange and strange heavy-light beauty vector mesons, with special emphasis on the ratio of any such decay constant to the decay constant of the corresponding pseudoscalar meson, by means of Borel-transformed QCD sum rules. Our results suggest that both these ratios are below unity.

  9. Decay Constants of Beauty Mesons from QCD Sum Rules

    CERN Document Server

    Lucha, Wolfgang; Simula, Silvano

    2014-01-01

    Our recently completed analysis of the decay constants of both pseudoscalar and vector beauty mesons reveals that in the bottom-quark sector two specific features of the sum-rule predictions show up: (i) For the input value of the bottom-quark mass in the $\\overline{\\rm MS}$ scheme $\\overline{m}_b(\\overline{m}_b)\\approx4.18\\;\\mbox{GeV},$ the sum-rule result $f_B\\approx210$-$220\\;\\mbox{MeV}$ for the $B$ meson decay constant is substantially larger than the recent lattice-QCD finding $f_B\\approx190\\;\\mbox{MeV}.$ Requiring QCD sum rules to reproduce the lattice-QCD value of $f_B$ yields a significantly larger $b$-quark mass: $\\overline{m}_b(\\overline{m}_b)=4.247\\;\\mbox{GeV}.$ (ii) Whereas QCD sum-rule predictions for the charmed-meson decay constants $f_D,$ $f_{D_s},$ $f_{D^*}$ and $f_{D_s^*}$ are practically independent of the choice of renormalization scale, in the beauty sector the results for the decay constants - and especially for the ratio $f_{B^*}/f_B$ - prove to be very sensitive to the specific scale s...

  10. Decay Constants of Beauty Mesons from QCD Sum Rules

    Directory of Open Access Journals (Sweden)

    Lucha Wolfgang

    2014-01-01

    Full Text Available Our recently completed analysis of the decay constants of both pseudoscalar and vector beauty mesons reveals that in the bottom-quark sector two specific features of the sum-rule predictions show up: (i For the input value of the bottom-quark mass in the M̅S̅ scheme m̅b(m̅b ≈ 4:18 GeV; the sum-rule result fB ≈ 210–220 MeV for the B meson decay constant is substantially larger than the recent lattice-QCD finding fB ≈ 190 MeV: Requiring QCD sum rules to reproduce the lattice-QCD value of fB yields a significantly larger b-quark mass: m̅b(m̅b = 4:247 GeV: (ii Whereas QCD sum-rule predictions for the charmed-meson decay constants fD; fDs, fD* and fDs* are practically independent of the choice of renormalization scale, in the beauty sector the results for the decay constants—and especially for the ratio fB* / fB—prove to be very sensitive to the specific scale setting.

  11. Semileptonic decays of strange beauty mesons at Belle

    Energy Technology Data Exchange (ETDEWEB)

    Oswald, Christian

    2015-06-19

    Semileptonic decays of b-flavoured mesons are an important tool for the determination of the CKM matrix element vertical stroke V{sub cb} vertical stroke. In this thesis, measurements of semileptonic B{sub s} meson decays are presented. They provide complementary information to the precision measurements of B meson decays and serve as a test of QCD-calculations predicting SU(3) flavour symmetry for the partial decay widths and form factors. The semi-inclusive and inclusive analyses of semileptonic B{sub s} decays are based on the 121.4 fb{sup -1} dataset collected by the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider in Tsukuba, Japan. The sample recorded at a centre-of-mass energy √(s)=10.86 GeV, which corresponds to the Y(5S) resonance, contains (7.1±1.3) million B{sub s} pair events. To measure the semi-inclusive B{sub s} → D{sub s}Xlν and B{sub s} → D{sub s}{sup *}Xlν branching fractions, D{sub s} and D{sub s}{sup *} candidates are reconstructed and are paired with an oppositely charged lepton, l{sup +}=e{sup +},μ{sup +}. The yields of correctly reconstructed D{sub s} and D{sub s}{sup *} mesons are determined by fits to their respective invariant mass distributions. The signal yield and the yields of the remaining backgrounds are extracted using kinematic distributions of the reconstructed decay products and the constraint from the known initial state of the e{sup +}e{sup -} collision. The measured branching fractions are: B(B{sub s} → D{sub s}Xlν)=(8.2±0.2(stat)±0.6(syst)±1.4(ext)) % and B(B{sub s} → D{sub s}{sup *}lν)=(5.4±0.4(stat)±0.4(syst)±0.9 (ext)) %, where the first two uncertainties are the statistical and systematic uncertainties of the measurement and the last uncertainty is due to external parameters. Making an assumption about the B{sub s} → D{sub s}Xlν branching fraction, the measurement of the B{sub s} → D{sub s}Xlν yield is also used to obtain the current best estimate of the B{sub s} pair

  12. Nonperturbative scalar-meson resonances with open charm and beauty

    CERN Document Server

    Van Beveren, E; Beveren, Eef van; Rupp, George

    2003-01-01

    We predict several new bound states and resonances for B-pion, B-Kaon, and B-D S-wave elastic scattering, within the same model which was recently employed to explain the D*sJ(2317)+ meson. In the charm-nonstrange sector we find a (virtual ?) bound state close to the B-pion threshold, and moreover two nearby resonances of comparable width in the range 5.9 to 6.1 GeV. We obtain bound states B*s0(5570) in b-sbar and B*c0(6490) in bbar-c, as well as resonances at higher energies. No JP=0+ states are found at 5.6 GeV (in bbar-u/d), at 5.7 GeV (in b-sbar), or at 6.1 GeV (in bbar-c), where they are predicted from pure confinement.

  13. Upper limits on beauty meson production in π- collisions at 280 GeV/c

    International Nuclear Information System (INIS)

    From events with two like-sign muons, or with three or four muons, observed in the NA3 spectrometer with 280 GeV/c incoming π- beam, we deduce upper limits on the production of beauty meson pairs Banti B. We use the leptonic branching ratios of B meson measured at CESR storage rings, and assume that no nuclear effects occur in the platinum target. We find sigma(Banti B) < 2 nb/nucleon for centrally produced Banti B pairs, and sigma(Banti B) < 10 nb/nucleon for a diffractive production. These values are one order of magnitude lower than previously published limits. As a consequence, the psipsi events observed in our experiment cannot come from Banti B decays. (orig.)

  14. Perturbative QCD fragmentation functions for production of p-wave mesons with charm and beauty

    CERN Document Server

    Yuan, T C

    1994-01-01

    Abstract: We calculate the leading order QCD fragmentation functions for the production of P-wave charmed beauty mesons. Long-distance effects are factored into two nonperturbative parameters: the derivative of the radial wavefunction at the origin and a second parameter related to the probability for a (\\bar b c) heavy quark pair that is produced in a color-octet S-wave state to form a color-singlet P-wave bound state. The four 2P states and those 3P states which lie below the BD flavor threshold eventually all decay into the 1S ground state B_c through hadronic cascades or by emitting photons. The total fragmentation probabilities for production of the 1S ground state B_c from the cascades of the 2P and 3P states are about 1.7 \\times 10^{-4} and 2.3 \\times 10^{-4} respectively. Thus the direct production of the P-wave states via fragmentation may account for a significant fraction of the inclusive production rate of the B_c at large transverse momentum in high energy colliders. Our analytic results for the ...

  15. Baryons with open beauty dynamically generated from meson-baryon interaction in the extended local hidden gauge approach

    Science.gov (United States)

    Liang, Wei-Hong; Xiao, C. W.; Oset, E.

    2016-05-01

    In this talk we review the results about the interaction of B ¯N , B ¯Δ, B ¯*N and B ¯*Δ states with beauty B = 1, together with their coupled channels, using the extended local hidden gauge approach. The Λb(5912) and Λb(5920) observed in the experiment are dynamically generated from the meson-baryon interaction, and they couple mostly to B ¯*N , which are degenerate with the Weinberg-Tomozawa interaction. In addition, three more states with I = 0 and eight more states with I = 1 are predicted.

  16. Mixing parameters of neutral beauty mesons from the Coulomb plus power potential (CPPν)

    Science.gov (United States)

    Patel, Bhavin; Vinodkumar, P. C.

    2009-11-01

    The investigation of mixing parameters in neutral B meson systems provides an important testing ground for standard model flavour dynamics. The spectroscopic parameters deduced from the potential model are used to calculate the pseudoscalar decay constant and mixing parameters of the B and Bs mesons.

  17. Tests of the infinite mass effective theory and properties of the charming and beautiful mesons

    Energy Technology Data Exchange (ETDEWEB)

    Narison, S. (European Organization for Nuclear Research, Geneva (Switzerland). Theoretical Physics Div.)

    1992-09-01

    Using an operator product expansion (OPE) in the inverse of the heavy quark mass M{sub Q} and a dispersive approach, we rederive the B and B* couplings and the Isgur-Wise function predicted by the infinite mass effective theory (IMET). We find that, at the subtraction point M{sub Q} and using VDM for the spectral function, these observables are governed by the universl light quark condensate. We also find that the corrections induced by finite values of M{sub c} and M{sub b} are large and are due to the splitting {Delta}{sub b} between the ground sate and its radial excitation. We review the determinations of the different decay constants, couplings and masses from QCD spectral sum rules (QSSR). For f{sub B} and f{sub D}, we conclude the optimum average: f{sub B}=(1.59{+-}0.09{+-}0.27)f{sub {pi}} and f{sub D}=(1.31{+-}0.12)f{sub {pi}}, where the main error is due to the quark mass, while the first one in f{sub B} in due to the non-perturbative terms and to the choice of the continuum threshold t{sub c} from the onset of sum rule variable stability until the t{sub c}-stability regions. We also find that the vector coupling {gamma}{sub V} satisfies approximately the IMET M{sub Q}{sup 3/2} mass dependence scaling law, while f{sub P} obeys in units of GeV: f{sub P}/f{sub {pi}}{approx equal}(4.6{+-}0.4) M{sub Q}{sup -1/2} (1-1.56/M{sub Q}+0.88/M{sub Q}{sup 2}), for M{sub Q}{>=}M{sub c}. We also predict the flavour independence: M{sub P}-M{sub Q}{approx equal}0.6-0.7 GeV and M{sub V}-M{sub Q}{approx equal}0.7-0.8 GeV of the mass differences between the mesons and the corresponding quark. Finally, we find that the B{yields}De{nu}{sub e} form factor f{sub +}(0){approx equal}(0.55{+-}0.10) deviates from the naive expectation (f{sub +}(0)=1). (orig.).

  18. The Lifetime of a beautiful and charming meson: Bc lifetime measured using the D0 detector

    Energy Technology Data Exchange (ETDEWEB)

    Welty-Rieger, Leah Christine [Indiana Univ., Bloomington, IN (United States)

    2008-09-01

    Using approximately 1.3 fb-1 of data collected by the D0 detector between 2002 and 2006, the lifetime of the Bc± meson is studied in the Bc± → J/Ψμ± + X final state. Using an unbinned likelihood simultaneous fit to J/Ψ + μ invariant mass and lifetime distributions, a signal of 810 ± 80(stat.) candidates is estimated and a lifetime measurement made of: τ(Bc±) = 0.448-0.036+0.038(stat) ± 0.032(sys) ps.

  19. Preasymptotic effects in beauty decays

    OpenAIRE

    Guberina, B.; Melic, B.; Stefancic, H.

    2000-01-01

    Large preasymptotic effects in beauty decays have been found using heavy-quark and SU(3) symmetry, as well as experimental data on charmed hyperons. Contrary to rather uniform beauty-meson lifetimes, a much larger spread of beauty-baryon lifetimes is predicted. However, it is highly unlikely that, theoretically, the $ \\tau(\\Lambda_b)/\\tau(B_d^0) $ ratio, which at present deviates more than $1\\sigma$ from the experimental result, can be lowered below 0.9.

  20. Theoretical overview: The New mesons

    Energy Technology Data Exchange (ETDEWEB)

    Quigg, Chris; /Fermilab

    2004-11-01

    After commenting on the state of contemporary hadronic physics and spectroscopy, I highlight four areas where the action is: searching for the relevant degrees of freedom, mesons with beauty and charm, chiral symmetry and the D{sub sJ} levels, and X(3872) and the lost tribes of charmonium.

  1. Beauty97 Conference Summary

    OpenAIRE

    Erhan, Samim

    1998-01-01

    CP-violation is one of the least understood phenomena in our field. There are major experimental programs in all high energy laboratories around the world which will hopefully remedy this within the next decade. The study of CP-violating effects in B meson decays will allow stringent tests of the Standard Model to be made and may point the way to New Physics. The Beauty97 conference provided a forum for these experiments to discuss their physics potential and experimental challenges relating ...

  2. Theory of Beauty Lifetimes

    OpenAIRE

    Neubert, Matthias(PRISMA Cluster of Excellence and Mainz Institut for Theoretical Physics, Johannes Gutenberg University, 55099, Mainz, Germany)

    1997-01-01

    A critical review of the theoretical understanding of the lifetimes of beauty hadrons is given. A model-independent analysis using the heavy-quark expansion allows for a description of the lifetime ratios tau(B-)/tau(B0) and tau(Lambda_b)/tau(B0) in a small region of parameter space. It is demonstrated that the lifetime ratio tau(B-)/tau(B0) cannot be used to extract the decay constant of the B meson. Implications for the semileptonic branching ratio and charm yield in B decays are pointed out.

  3. A trigger for beauty

    International Nuclear Information System (INIS)

    The possibility of B-meson experiments, in a fixed-target high-energy proton machine (Tevatron) is discussed. Compared to a B-meson factory experiment, it can produce 105, Banti B's per hour, using 108 protons per second, but it suffers from high background and needs high selectivity to cope with the million times higher interaction rate. To overcome these difficulties a technique called the 'optical trigger for beauty' is proposed, based on the detection of Cherenkov photons produced in a 2 mm thick LiF crystal, through a fast photodetector. Its virtue is that it is opaque to minimum-bias events originating in a small target, but sensitive to the high impact parameter B-meson decay charged particles from a secondary vertex. Calculations and first simulations results give a good efficiency for B-meson detection. A multistep trigger, combining the 'optical trigger' and a tracking detector, allows significant selection and a consequent enrichment of the data sample. Taking into account its fast response (∝ 1 ns), the above considerations can be extended to other hadronic machines, especially those with high-rate environments such as the LHC or SSC. (orig.)

  4. Charm and beauty measurements at Fermilab fixed target

    International Nuclear Information System (INIS)

    Eighteen months after a successful run of the Fermilab fixed target program, interesting results from several experiments are available. This is the first time that more than one Fermilab fixed target experiment has reported the observation of beauty mesons. In this paper the author reviews recent results from charm and beauty fixed target experiments at Fermilab

  5. Charm and beauty measurements at Fermilab fixed target

    International Nuclear Information System (INIS)

    Eighteen months after a successful run of the Fermilab fixed target program, interesting results from several experiments are available. This is the first time that more than one Fermilab fixed target experiment has reported the observation of beauty mesons. In this paper we review recent results from charm and beauty fixed target experiments at Fermilab

  6. Charm and Beauty in Photoproduction at HERA

    Science.gov (United States)

    Dobre, Monica

    2014-04-01

    The photoproduction of beauty and charm quarks at the ep collider HERA are presented. The b-quarks production was investigated in the bb → eeX' channel and the differential production cross section was measured as a function of the average transverse momentum of the beauty quarks down to the threshold. The cross section of D* meson decaying in the golden channel was determined both inclusively and in D*-tagged dijet events. Exploiting the characteristics of the heavy-flavoured hadron decays, beauty and charm quark cross sections were also measured in dijet events using secondary vertices or semi-muonic decays.

  7. Beautiful Politicians

    OpenAIRE

    Amy King; Andrew Leigh

    2009-01-01

    Are beautiful politicians more likely to be elected? To test this, we use evidence from Australia, a country in which voting is compulsory, and in which voters are given ‘How to Vote’ cards depicting photos of the major party candidates as they arrive to vote. Using raters chosen to be representative of the electorate, we assess the beauty of political candidates from major political parties, and then estimate the effect of beauty on voteshare for candidates in the 2004 federal election. Beau...

  8. Non-leptonic decays of beauty decays

    CERN Document Server

    Bigi, Ikaros I; Shifman, M; Uraltsev, N; Vainshtein, A I

    1994-01-01

    "Anyone who keeps the ability to see beauty never grows old" (Franz Kafka). In the last few years considerable progress has been achieved in our understanding of the decays of heavy flavour hadrons. One can now calculate inclusive transition rates in QCD proper through an expansion in inverse powers of the heavy flavour quark mass without recourse to phenomenological assumptions. The non-perturbative contributions are treated systematically in this way; they are found to produce corrections of order a few percent in beauty decays, i.e. typically somewhat smaller than the perturbative corrections. One finds, among other things: (a) The lifetime of $B^-$ mesons is predicted to be longer than that of $B^0$ mesons by several percent. (b) The QCD prediction for the semileptonic branching ratio of $B$ mesons appears to exceed present experimental values.

  9. Bc mesons in the deconfined phase

    Directory of Open Access Journals (Sweden)

    Czerski Piotr

    2014-01-01

    Full Text Available Charmed B mesons in a deconfined quark-gluon plasma are studied. With the introduction of the bound state of a charm and a beauty quarks at finite temperature, the behavior of the heavy quarkonium is investigated in an energy region between the ψ and the ϒ states [1]. Calculations are performed within a potential model [2, 3].

  10. Beautiful equations

    Science.gov (United States)

    Viljamaa, Panu; Jacobs, J. Richard; Chris; JamesHyman; Halma, Matthew; EricNolan; Coxon, Paul

    2014-07-01

    In reply to a Physics World infographic (part of which is given above) about a study showing that Euler's equation was deemed most beautiful by a group of mathematicians who had been hooked up to a functional magnetic-resonance image (fMRI) machine while viewing mathematical expressions (14 May, http://ow.ly/xHUFi).

  11. Beautiful Flowers

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    春天到了,百花盛开,我们常说“美丽的鲜花”,就是:beautiful flowers。是不是觉得这两个单词有点儿难记呢?没关系,来玩玩我们的进宫吧,它能帮助你牢牢记住这两个单词的拼法。

  12. Beautiful city

    OpenAIRE

    Gerald A. Carlino

    2009-01-01

    Proponents of the City Beautiful movement advocated for sizable public investments in monumental spaces, street beautification, and classical architecture. Today, economists and policymakers see the provision of consumer leisure amenities as a way to attract people and jobs to cities. But past studies have provided only indirect evidence of the importance of leisure amenities for urban growth and development. In this article, Jerry Carlino uses a new data set on the number of leisure tourist ...

  13. Beautiful Serbia

    OpenAIRE

    Bonin, Holger; Rinne, Ulf

    2006-01-01

    The paper studies the causal impact of participation in an active labor market program - the 'Beautiful Serbia' program providing training and temporary work in the construction sector in Serbia and Montenegro - on measures of subjective well-being approximating individual welfare. According to our estimates, the positive impact of this particular program appears much stronger judged by subjective well-being than judged by the immediate labor market effect.

  14. City Beautiful

    OpenAIRE

    Gerald A. Carlino; Saiz, Albert

    2008-01-01

    The City Beautiful movement, which in the early 20th century advocated city beautification as a way to improve the living conditions and civic virtues of the urban dweller, had languished by the Great Depression. Today, new urban economic theorists and policymakers are coming to see the provision of consumer leisure amenities as a way to attract population, especially the highly skilled and their employers. However, past studies have provided only indirect evidence of the importance of leisur...

  15. Beautiful kit

    OpenAIRE

    Mark Miodownik

    2004-01-01

    Mark Miodownik reports on laboratory machines such as scanning electron microscopes with energy dispersive X-ray analysis which is latest thing. The author finds high status of scientific instruments in science laboratory which are the aesthetics of instrument design. The astrolabs, microscopes, telescopes and armillary spheres are beautiful objects according to the author. The equipment design provides demonstration of functionality over form and declares superfluousness of aesthetics to sci...

  16. New hidden beauty molecules predicted by the local hidden gauge approach and heavy quark spin symmetry

    Science.gov (United States)

    Xiao, C. W.; Ozpineci, A.; Oset, E.

    2015-10-01

    Using a coupled channel unitary approach, combining the heavy quark spin symmetry and the dynamics of the local hidden gauge, we investigate the meson-meson interaction with hidden beauty. We obtain several new states of isospin I = 0: six bound states, and weakly bound six more possible states which depend on the influence of the coupled channel effects.

  17. Beautiful geometry

    CERN Document Server

    Maor, Eli

    2014-01-01

    If you've ever thought that mathematics and art don't mix, this stunning visual history of geometry will change your mind. As much a work of art as a book about mathematics, Beautiful Geometry presents more than sixty exquisite color plates illustrating a wide range of geometric patterns and theorems, accompanied by brief accounts of the fascinating history and people behind each. With artwork by Swiss artist Eugen Jost and text by acclaimed math historian Eli Maor, this unique celebration of geometry covers numerous subjects, from straightedge-and-compass constructions to intriguing configur

  18. Beauty pays but does investment in beauty?

    OpenAIRE

    Lee, Soohyung

    2015-01-01

    Being beautiful gives a person an advantage in many settings. Attractive people earn more and have an easier time getting hired. People spend large amounts of money on goods and services to enhance their beauty. Is this enhancement worth pursuing? Research suggests that the expected improvement in beauty from these goods and services is limited. Therefore, despite the large returns from having an attractive appearance, the cost-effectiveness of investment in beauty enhancement is ambiguous. F...

  19. Top mesons

    Energy Technology Data Exchange (ETDEWEB)

    Fabiano, N. [Perugia, Univ. (Italy)]|[INFN, Frascati (Italy). Laboratori Nazionali di Frascati

    1997-03-01

    The possibility of formation for a bound state of a t quark and a lighter one is investigated using potential model predictions and heavy quark effective theory approach. Resulting estimates for the 1S-2S splitting of the energy levels are compared to the total top decay width {Gamma}{sub t}. As for the case of toponium, their conclusions show that the probability of formation for T-mesons is negligibly small due to the high top mass value.

  20. Measurement of Charm and Beauty Photoproduction at HERA using D* mu Correlations

    CERN Document Server

    Aktas, A; Anthonis, T; Asmone, A; Babaev, A; Backovic, S; Bähr, J; Baranov, P; Barrelet, E; Bartel, Wulfrin; Baumgartner, S; Becker, J; Beckingham, M; Behnke, O; Behrendt, O; Belousov, A; Berger, C; Berger, N; Berndt, T; Bizot, J C; Böhme, J; Boenig, M O; Boudry, V; Bracinik, J; Brisson, V; Broker, H B; Brown, D P; Bruncko, Dusan; Büsser, F W; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, A J; Caron, S; Cassol-Brunner, F; Cerny, K; Chekelian, V; Contreras, J G; Coppens, Y R; Coughlan, J A; Cox, B E; Cozzika, G; Cvach, J; Dainton, J B; Dau, W D; Daum, K; Delcourt, B; Demirchyan, R; de Roeck, A; Desch, Klaus; De Wolf, E A; Diaconu, C; Dingfelder, J; Dodonov, V; Dubak, A; Duprel, C; Eckerlin, G; Efremenko, V; Egli, S; Eichler, R; Eisele, F; Ellerbrock, M; Elsen, E; Erdmann, W; Faulkner, P J W; Favart, L; Fedotov, A; Felst, R; Ferencei, J; Fleischer, M; Fleischmann, P; Fleming, Y H; Flucke, G; Flügge, G; Fomenko, A; Foresti, I; Formánek, J; Franke, G; Frising, G; Gabathuler, Erwin; Gabathuler, K; Garutti, E; Garvey, J; Gayler, J; Gerhards, R; Gerlich, C; Ghazaryan, S; Ginzburgskaya, S; Görlich, L; Gogitidze, N; Gorbounov, S; Grab, C; Grässler, Herbert; Greenshaw, T; Gregori, M; Grindhammer, G; Gwilliam, C; Haidt, D; Hajduk, L; Haller, J; Hansson, M; Heinzelmann, G; Henderson, R C W; Henschel, H; Henshaw, O; Herrera-Corral, G; Herynek, I; Heuer, R D; Hildebrandt, M; Hiller, K H; Hoting, P; Hoffmann, D; Horisberger, R P; Hovhannisyan, A; Ibbotson, M; Ismail, M; Jacquet, M; Janauschek, L; Janssen, X; Jemanov, V; Jönsson, L B; Johnson, D P; Jung, H; Kant, D; Kapichine, M; Karlsson, M; Katzy, J; Keller, N; Kenyon, I R; Kiesling, C; Klein, M; Kleinwort, C; Klimkovich, T; Kluge, T; Knies, G; Knutsson, A; Koblitz, B; Korbel, V; Kostka, P; Koutouev, R; Kropivnitskaya, A; Kroseberg, J; Krüger, K; Kuckens, J; Landon, M P J; Lange, W; Lastoviicka, T; Laycock, P; Lebedev, A; Leiner, B; Lemrani, R; Lendermann, V; Levonian, S; Lindfeld, L; Lipka, K; List, B; Lobodzinska, E; Loktionova, N; López-Fernandez, R; Lubimov, V; Lüders, H; Lüke, D; Lux, T; Lytkin, L; Makankine, A; Malden, N; Malinovskii, E I; Mangano, S; Marage, P; Marks, J; Marshall, R; Martisikova, M; Martyn, H U; Maxfield, S J; Meer, D; Mehta, A; Meier, K; Meyer, A B; Meyer, H; Meyer, J; Mikocki, S; Milcewicz-Mika, I; Milstead, D; Mohamed, A; Moreau, F; Morozov, A; Morris, J V; Mozer, M U; Müller, K; Murn, P; Nagovizin, V; Nankov, K; Naroska, Beate; Naumann, J; Naumann, T; Newman, P R; Niebuhr, C B; Nikiforov, A; Nikitin, D K; Nowak, G; Nozicka, M; Oganezov, R; Olivier, B; Olsson, J E; Ozerov, D; Paramonov, A A; Pascaud, C; Patel, G D; Peez, M; Pérez, E; Perieanu, A; Petrukhin, A; Pitzl, D; Placakyte, R; Pöschl, R; Portheault, B; Povh, B; Raicevic, N; Reimer, P; Reisert, B; Rimmer, A; Risler, C; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rurikova, Z; Rusakov, S V; Rybicki, K; Sankey, D P C; Sauvan, E; Schatzel, S; Scheins, J; Schilling, F P; Schleper, P; Schmidt, S; Schmitt, S; Schneider, M; Schoeffel, L; Schöning, A; Schröder, V; Schultz-Coulon, H C; Schwanenberger, C; Sedlak, K; Sefkow, F; Shevyakov, I; Shtarkov, L N; Sirois, Y; Sloan, T; Smirnov, P; Soloviev, Yu; South, D; Spaskov, V; Specka, A; Spitzer, H; Stamen, R; Stella, B; Stiewe, J; Strauch, I; Straumann, U; Tchoulakov, V; Thompson, G; Thompson, P D; Tomasz, F; Traynor, D; Truöl, P; Tsipolitis, G; Tsurin, I; Turnau, J; Tzamariudaki, E; Uraev, A; Urban, M; Usik, A; Utkin, D; Valkár, S; Valkárová, A; Vallée, C; Van Mechelen, P; Van Remortel, N; Vargas-Trevino, A; Vazdik, Ya A; Veelken, C; Vest, A; Vinokurova, S; Volchinski, V; Wacker, K; Wagner, J; Weber, G; Weber, R; Wegener, D; Werner, C; Werner, N; Wessels, M; Wessling, B; Winter, G G; Wissing, C; Woerling, E E; Wolf, R; Wünsch, E; Xella, S M; Yan, W; Yeganov, V; Zaicek, J; Zaleisak, J; Zhang, Z; Zhelezov, A; Zhokin, A; Zohrabyan, H G; Zomer, F

    2005-01-01

    A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D*^{\\pm} meson and a muon. The correlation between the D* meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher.

  1. Measurement of charm and beauty photoproduction at HERA using Dμ correlations

    Science.gov (United States)

    H1 Collaboration; Aktas, A.; Andreev, V.; Anthonis, T.; Aplin, S.; Asmone, A.; Astvatsatourov, A.; Babaev, A.; Backovic, S.; Bähr, J.; Baghdasaryan, A.; Baranov, P.; Barrelet, E.; Bartel, W.; Baudrand, S.; Baumgartner, S.; Becker, J.; Beckingham, M.; Behnke, O.; Behrendt, O.; Belousov, A.; Berger, Ch.; Berger, N.; Bizot, J. C.; Boenig, M.-O.; Boudry, V.; Bracinik, J.; Brandt, G.; Brisson, V.; Brown, D. P.; Bruncko, D.; Büsser, F. W.; Bunyatyan, A.; Buschhorn, G.; Bystritskaya, L.; Campbell, A. J.; Caron, S.; Cassol-Brunner, F.; Cerny, K.; Cerny, V.; Chekelian, V.; Contreras, J. G.; Coughlan, J. A.; Cox, B. E.; Cozzika, G.; Cvach, J.; Dainton, J. B.; Dau, W. D.; Daum, K.; Delcourt, B.; Demirchyan, R.; de Roeck, A.; Desch, K.; de Wolf, E. A.; Diaconu, C.; Dodonov, V.; Dubak, A.; Eckerlin, G.; Efremenko, V.; Egli, S.; Eichler, R.; Eisele, F.; Ellerbrock, M.; Elsen, E.; Erdmann, W.; Essenov, S.; Falkewicz, A.; Faulkner, P. J. W.; Favart, L.; Fedotov, A.; Felst, R.; Ferencei, J.; Finke, L.; Fleischer, M.; Fleischmann, P.; Fleming, Y. H.; Flucke, G.; Fomenko, A.; Foresti, I.; Formánek, J.; Franke, G.; Frising, G.; Frisson, T.; Gabathuler, E.; Garutti, E.; Gayler, J.; Gerhards, R.; Gerlich, C.; Ghazaryan, S.; Ginzburgskaya, S.; Glazov, A.; Glushkov, I.; Goerlich, L.; Goettlich, M.; Gogitidze, N.; Gorbounov, S.; Goyon, C.; Grab, C.; Greenshaw, T.; Gregori, M.; Grindhammer, G.; Gwilliam, C.; Haidt, D.; Hajduk, L.; Haller, J.; Hansson, M.; Heinzelmann, G.; Henderson, R. C. W.; Henschel, H.; Henshaw, O.; Herrera, G.; Hildebrandt, M.; Hiller, K. H.; Hoffmann, D.; Horisberger, R.; Hovhannisyan, A.; Ibbotson, M.; Ismail, M.; Jacquet, M.; Janauschek, L.; Janssen, X.; Jemanov, V.; Jönsson, L.; Johnson, D. P.; Jung, H.; Kapichine, M.; Karlsson, M.; Katzy, J.; Keller, N.; Kenyon, I. R.; Kiesling, C.; Klein, M.; Kleinwort, C.; Klimkovich, T.; Kluge, T.; Knies, G.; Knutsson, A.; Korbel, V.; Kostka, P.; Koutouev, R.; Krastev, K.; Kretzschmar, J.; Kropivnitskaya, A.; Krüger, K.; Kückens, J.; Landon, M. P. J.; Lange, W.; Laštovička, T.; Laycock, P.; Lebedev, A.; Leißner, B.; Lendermann, V.; Levonian, S.; Lindfeld, L.; Lipka, K.; List, B.; Lobodzinska, E.; Loktionova, N.; Lopez-Fernandez, R.; Lubimov, V.; Lucaci-Timoce, A.-I.; Lueders, H.; Lüke, D.; Lux, T.; Lytkin, L.; Makankine, A.; Malden, N.; Malinovski, E.; Mangano, S.; Marage, P.; Marshall, R.; Martisikova, M.; Martyn, H.-U.; Maxfield, S. J.; Meer, D.; Mehta, A.; Meier, K.; Meyer, A. B.; Meyer, H.; Meyer, J.; Mikocki, S.; Milcewicz-Mika, I.; Milstead, D.; Mohamed, A.; Moreau, F.; Morozov, A.; Morris, J. V.; Mozer, M. U.; Müller, K.; Murín, P.; Nankov, K.; Naroska, B.; Naumann, J.; Naumann, Th.; Newman, P. R.; Niebuhr, C.; Nikiforov, A.; Nikitin, D.; Nowak, G.; Nozicka, M.; Oganezov, R.; Olivier, B.; Olsson, J. E.; Osman, S.; Ozerov, D.; Palichik, V.; Papadopoulou, T.; Pascaud, C.; Patel, G. D.; Peez, M.; Perez, E.; Perez-Astudillo, D.; Perieanu, A.; Petrukhin, A.; Pitzl, D.; Plačakytė, R.; Portheault, B.; Povh, B.; Prideaux, P.; Raicevic, N.; Reimer, P.; Rimmer, A.; Risler, C.; Rizvi, E.; Robmann, P.; Roland, B.; Roosen, R.; Rostovtsev, A.; Rurikova, Z.; Rusakov, S.; Salvaire, F.; Sankey, D. P. C.; Sauvan, E.; Schätzel, S.; Schilling, F.-P.; Schmidt, S.; Schmitt, S.; Schmitz, C.; Schoeffel, L.; Schöning, A.; Schröder, V.; Schultz-Coulon, H.-C.; Schwanenberger, C.; Sedlák, K.; Sefkow, F.; Sheviakov, I.; Shtarkov, L. N.; Sirois, Y.; Sloan, T.; Smirnov, P.; Soloviev, Y.; South, D.; Spaskov, V.; Specka, A.; Stella, B.; Stiewe, J.; Strauch, I.; Straumann, U.; Tchoulakov, V.; Thompson, G.; Thompson, P. D.; Tomasz, F.; Traynor, D.; Truöl, P.; Tsakov, I.; Tsipolitis, G.; Tsurin, I.; Turnau, J.; Tzamariudaki, E.; Urban, M.; Usik, A.; Utkin, D.; Valkár, S.; Valkárová, A.; Vallée, C.; van Mechelen, P.; van Remortel, N.; Vargas Trevino, A.; Vazdik, Y.; Veelken, C.; Vest, A.; Vinokurova, S.; Volchinski, V.; Vujicic, B.; Wacker, K.; Wagner, J.; Weber, G.; Weber, R.; Wegener, D.; Werner, C.; Werner, N.; Wessels, M.; Wessling, B.; Wigmore, C.; Winter, G.-G.; Wissing, Ch.; Wolf, R.; Wünsch, E.; Xella, S.; Yan, W.; Yeganov, V.; Žáček, J.; Zálešák, J.; Zhang, Z.; Zhelezov, A.; Zhokin, A.; Zimmermann, J.; Zohrabyan, H.; Zomer, F.

    2005-08-01

    A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D meson and a muon. The correlation between the D meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher.

  2. Measurement of charm and beauty photoproduction at HERA using D* μ correlations

    Science.gov (United States)

    Aktas, A.; Andreev, V.; Anthonis, T.; Aplin, S.; Asmone, A.; Astvatsatourov, A.; Babaev, A.; Backovic, S.; Bähr, J.; Baghdasaryan, A.; Baranov, P.; Barrelet, E.; Bartel, W.; Baudrand, S.; Baumgartner, S.; Becker, J.; Beckingham, M.; Behnke, O.; Behrendt, O.; Belousov, A.; Berger, Ch.; Berger, N.; Bizot, J. C.; Boenig, M.-O.; Boudry, V.; Bracinik, J.; Brandt, G.; Brisson, V.; Brown, D. P.; Bruncko, D.; Büsser, F. W.; Bunyatyan, A.; Buschhorn, G.; Bystritskaya, L.; Campbell, A. J.; Caron, S.; Cassol-Brunner, F.; Cerny, K.; Cerny, V.; Chekelian, V.; Contreras, J. G.; Coughlan, J. A.; Cox, B. E.; Cozzika, G.; Cvach, J.; Dainton, J. B.; Dau, W. D.; Daum, K.; Delcourt, B.; Demirchyan, R.; De Roeck, A.; Desch, K.; De Wolf, E. A.; Diaconu, C.; Dodonov, V.; Dubak, A.; Eckerlin, G.; Efremenko, V.; Egli, S.; Eichler, R.; Eisele, F.; Ellerbrock, M.; Elsen, E.; Erdmann, W.; Essenov, S.; Falkewicz, A.; Faulkner, P. J. W.; Favart, L.; Fedotov, A.; Felst, R.; Ferencei, J.; Finke, L.; Fleischer, M.; Fleischmann, P.; Fleming, Y. H.; Flucke, G.; Fomenko, A.; Foresti, I.; Formánek, J.; Franke, G.; Frising, G.; Frisson, T.; Gabathuler, E.; Garutti, E.; Gayler, J.; Gerhards, R.; Gerlich, C.; Ghazaryan, S.; Ginzburgskaya, S.; Glazov, A.; Glushkov, I.; Goerlich, L.; Goettlich, M.; Gogitidze, N.; Gorbounov, S.; Goyon, C.; Grab, C.; Greenshaw, T.; Gregori, M.; Grindhammer, G.; Gwilliam, C.; Haidt, D.; Hajduk, L.; Haller, J.; Hansson, M.; Heinzelmann, G.; Henderson, R. C. W.; Henschel, H.; Henshaw, O.; Herrera, G.; Hildebrandt, M.; Hiller, K. H.; Hoffmann, D.; Horisberger, R.; Hovhannisyan, A.; Ibbotson, M.; Ismail, M.; Jacquet, M.; Janauschek, L.; Janssen, X.; Jemanov, V.; Jönsson, L.; Johnson, D. P.; Jung, H.; Kapichine, M.; Karlsson, M.; Katzy, J.; Keller, N.; Kenyon, I. R.; Kiesling, C.; Klein, M.; Kleinwort, C.; Klimkovich, T.; Kluge, T.; Knies, G.; Knutsson, A.; Korbel, V.; Kostka, P.; Koutouev, R.; Krastev, K.; Kretzschmar, J.; Kropivnitskaya, A.; Krüger, K.; Kückens, J.; Landon, M. P. J.; Lange, W.; Laštovička, T.; Laycock, P.; Lebedev, A.; Leißner, B.; Lendermann, V.; Levonian, S.; Lindfeld, L.; Lipka, K.; List, B.; Lobodzinska, E.; Loktionova, N.; Lopez-Fernandez, R.; Lubimov, V.; Lucaci-Timoce, A.-I.; Lueders, H.; Lüke, D.; Lux, T.; Lytkin, L.; Makankine, A.; Malden, N.; Malinovski, E.; Mangano, S.; Marage, P.; Marshall, R.; Martisikova, M.; Martyn, H.-U.; Maxfield, S. J.; Meer, D.; Mehta, A.; Meier, K.; Meyer, A. B.; Meyer, H.; Meyer, J.; Mikocki, S.; Milcewicz-Mika, I.; Milstead, D.; Mohamed, A.; Moreau, F.; Morozov, A.; Morris, J. V.; Mozer, M. U.; Müller, K.; Murín, P.; Nankov, K.; Naroska, B.; Naumann, J.; Naumann, Th.; Newman, P. R.; Niebuhr, C.; Nikiforov, A.; Nikitin, D.; Nowak, G.; Nozicka, M.; Oganezov, R.; Olivier, B.; Olsson, J. E.; Osman, S.; Ozerov, D.; Palichik, V.; Papadopoulou, T.; Pascaud, C.; Patel, G. D.; Peez, M.; Perez, E.; Perez-Astudillo, D.; Perieanu, A.; Petrukhin, A.; Pitzl, D.; Plačakytė, R.; Portheault, B.; Povh, B.; Prideaux, P.; Raicevic, N.; Reimer, P.; Rimmer, A.; Risler, C.; Rizvi, E.; Robmann, P.; Roland, B.; Roosen, R.; Rostovtsev, A.; Rurikova, Z.; Rusakov, S.; Salvaire, F.; Sankey, D. P. C.; Sauvan, E.; Schätzel, S.; Schilling, F.-P.; Schmidt, S.; Schmitt, S.; Schmitz, C.; Schoeffel, L.; Schöning, A.; Schröder, V.; Schultz-Coulon, H.-C.; Schwanenberger, C.; Sedlák, K.; Sefkow, F.; Sheviakov, I.; Shtarkov, L. N.; Sirois, Y.; Sloan, T.; Smirnov, P.; Soloviev, Y.; South, D.; Spaskov, V.; Specka, A.; Stella, B.; Stiewe, J.; Strauch, I.; Straumann, U.; Tchoulakov, V.; Thompson, G.; Thompson, P. D.; Tomasz, F.; Traynor, D.; Truöl, P.; Tsakov, I.; Tsipolitis, G.; Tsurin, I.; Turnau, J.; Tzamariudaki, E.; Urban, M.; Usik, A.; Utkin, D.; Valkár, S.; Valkárová, A.; Vallée, C.; Van Mechelen, P.; Van Remortel, N.; Vargas Trevino, A.; Vazdik, Y.; Veelken, C.; Vest, A.; Vinokurova, S.; Volchinski, V.; Vujicic, B.; Wacker, K.; Wagner, J.; Weber, G.; Weber, R.; Wegener, D.; Werner, C.; Werner, N.; Wessels, M.; Wessling, B.; Wigmore, C.; Winter, G.-G.; Wissing, Ch.; Wolf, R.; Wünsch, E.; Xella, S.; Yan, W.; Yeganov, V.; Žáček, J.; Zálešák, J.; Zhang, Z.; Zhelezov, A.; Zhokin, A.; Zimmermann, J.; Zohrabyan, H.; Zomer, F.; H1 Collaboration

    2005-08-01

    A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D*± meson and a muon. The correlation between the D* meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher.

  3. Beautiful asymmetry

    International Nuclear Information System (INIS)

    The LHCb experiment at CERN will allow researchers to study the difference between matter and antimatter with unprecedented accuracy, explains Roger Forty. Our current understanding of matter and forces at the subatomic scale, as embodied in the Standard Model of particle physics, is widely considered incomplete. Its most famous missing ingredient is the Higgs Boson, thought to endow all particles with mass, but there are strong indications that other pieces of the theoretical jigsaw puzzle are missing too. One of these concerns 'dark matter', the mysterious substance thought to make up more than a fifth of the universe. Postulated to account for gravitational effects that cannot be explained by the amount of visible matter alone, dark matter could be made up of exotic new particles that are not described by the Standard Model. Fortunately, there is a good chance that such particles - and the Higgs - will be created in the high-energy collisions between protons at the Large Hadron Collider (LHC). There are two approaches to discovering such new physics. The first is to try and observe the new particles directly by detecting their decay products, which will be the goal of the two giant 'general-purpose' LHC experiments ATLAS and CMS. The alternative approach is to make precision measurements of parameters that are predicted within the Standard Model and to look for deviations that could be due to as-yet-undetected particles. This is the goal of the LHCb (LHC beauty) experiment, which is dedicated to the precision study of particles that contain the bottom or beauty quark. (U.K.)

  4. Meson photoproduction (CLAS)

    Energy Technology Data Exchange (ETDEWEB)

    Steffen Strauch

    2009-10-01

    This is a brief and selective discussion of meson photoproduction measurements with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Meson photo- production is being used as a tool for various investigations, including the spectroscopy of baryons and mesons and the search for vector-meson medium modifications.

  5. Mass spectra of B, Bs mesons using Dirac formalism with martin-like confinement potential

    International Nuclear Information System (INIS)

    The predictions of masses of heavy-light system for low-lying states of these open beauty mesons thus become important from the point of view of understanding the behaviour of quantum chromodynamics at this hadronic scale. More over, these are open flavour beauty mesons, their decays are dominated by weak interaction processes and are free from interference due to strong interaction processes. Thus the complete understanding of the spectroscopy and decay properties of these open flavour mesons becomes very important. Though there exist theoretical predictions for the low lying states of B, Bs mesons, their excited state predictions in view of the new observations in the energy range 5-6 GeV become topics of current interest. Here we study the mass spectra of B and Bs mesons in a relativistic framework

  6. The Real Beauty

    Institute of Scientific and Technical Information of China (English)

    胡晓媛

    2015-01-01

    it is well-known that all men search for beauty.Although the definition of beauty changes as time goes by,people still spare no efforts to pursue beauty in their lives.Meanwhile,most people try every means to make their body images better.With more people increasingly being eager for beauty in various ways,it is high time that we should think deeply about the concept of real beauty.In this paper,an attempt has been made to shed light on the real beauty.It is not completely physical appearance or slim figure,but a healthy body and peaceful mind as well as admirable courage.Above all,whether people can realize the nature of real beauty is certainly worthwhile for us to ponder.

  7. The Real Beauty

    Institute of Scientific and Technical Information of China (English)

    胡晓媛

    2015-01-01

    it is well-known that all men search for beauty. Although the definition of beauty changes as time goes by,people still spare no efforts to pursue beauty in their lives. Meanwhile,most people try every means to make their body images better.With more people increasingly being eager for beauty in various ways,it is high time that we should think deeply about the concept of real beauty.Inthis paper,an attempt has been made to shed light on the real beauty.It is not completely physical appearance or slim figure,but a healthy body and peaceful mind as well as admirable courage.Above all,whether people can realize the nature of real beauty is certainly worthwhile for us to ponder.

  8. Open charm and beauty production in hadron reactions

    Energy Technology Data Exchange (ETDEWEB)

    Lykasov, G.I.; Lyubushkin, V.V.; Bednyakov, V.A. [Joint Institute for Nuclear Research, 141980, Dubna, Moscow region (Russian Federation)

    2010-01-15

    The production of charmed and beauty hadrons in proton-proton and proton-antiproton collisions at high energies is analyzed within the modified quark-gluon string model (QGSM) including the internal motion of quarks in colliding hadrons. It is shown that using both the QGSM and NLO QCD one can describe these experimental data rather successfully in a wide region of transverse momenta. We also present some predictions for the future experiments on the beauty baryon production in pp collisions at LHC energies and on the charmed meson production in p-bar p reactions at GSI energies.

  9. Prediction of super-heavy N{sup Low-Asterisk} and {Lambda}{sup Low-Asterisk} resonances with hidden beauty

    Energy Technology Data Exchange (ETDEWEB)

    Wu Jiajun, E-mail: wujiajun@ihep.ac.cn [Institute of High Energy Physics, CAS, P.O. Box 918(4), Beijing 100049 (China); Zhao Lu [Institute of High Energy Physics, CAS, P.O. Box 918(4), Beijing 100049 (China); Zou, B.S. [Institute of High Energy Physics, CAS, P.O. Box 918(4), Beijing 100049 (China); Theoretical Physics Center for Science Facilities, CAS, Beijing 100049 (China)

    2012-03-13

    The meson-baryon coupled channel unitary approach with the local hidden gauge formalism is extended to the hidden beauty sector. A few narrow N{sup Low-Asterisk} and {Lambda}{sup Low-Asterisk} resonances around 11 GeV are predicted as dynamically generated states from the interactions of heavy beauty mesons and baryons. Production cross sections of these predicted resonances in pp and ep collisions are estimated as a guide for the possible experimental search at relevant facilities.

  10. Open Beauty Production

    OpenAIRE

    Sefkow, Felix

    2001-01-01

    We review measurements of open beauty production at HERA, with emphasis on recent results based on lifetime signatures. The beauty cross sections in photoproduction and deep-inelastic scattering are found to be higher than expected in QCD at next-to-leading order. The discussion includes new results on beauty production in e+e-, gamma-gamma and p-bar-p interactions. An outlook on the potential for measurements with the upgraded HERA collider and experiments is also given.

  11. Probing new CP violating observables in D meson decays

    Science.gov (United States)

    Liu, Yong-Feng; Kang, Xian-Wei

    2016-08-01

    CP violation in the charm quark sector has not been examined very well as the case for strange and beauty ones. Some novel insights into the issue on the CP violation in D meson decay are discussed. Specifically, i) the T-violating observables in D → VV decays are constructed. Assuming CPT invariance T violation implies CP violation. This is a new idea and an alternative way for probing CP violation in D decays; ii) the decay of quantum correlated DD̅ pair to vector mesons (denoted by V) is explored, which offers the new CP violating observables that have not been noticed before;

  12. Unexpected Mesons X, Y, Z, ... (tetraquarks? hadron molecules? ...)

    CERN Document Server

    Azimov, Ya I

    2015-01-01

    This talk briefly discusses the set of meson resonances discovered in the latest decade. They are frequently treated in the literature as tetraquarks or hadron molecules. Our consideration (using the energy-time uncertainty relation) suggests, however, that the most reasonable description for each of them may be a two- (or more-) component Fock column, with one line being a conventional quark-antiquark pair, and the other line(s) corresponding to a charmed (or beauty) meson-antimeson pair near its threshold. Detailed investigation of decay properties might allow to reveal presence of several Fock components and separate their contributions.

  13. Beauty and charm production from Fermilab experiment 789

    Energy Technology Data Exchange (ETDEWEB)

    Jansen, D.M.; Boissevain, J.; Carey, T.A.; Jeppesen, R.G.; Kapustinsky, J.S.; Lane, D.W.; Leitch, M.J.; Lillberg, J.W.; McGaughey, P.L.; Moss, J.M.; Peng, J.C. [Los Alamos National Lab., NM (United States); Brown, G.; Isenhower, L.D.; Keyser, J.; Sadler, M.E.; Schnathorst, R.; Schwindt, R. [Abilene Christian Univ., TX (United States); Gidal, G.; Ho, P.M.; Kowitt, M.S.I.; Luk, K.B.; Pripstein, D. [Lawrence Berkeley Lab., CA (United States); Lederman, L.M.; Schub, M.H. [Chicago Univ., IL (United States); Brown, C.N.; Cooper, W.E.; Glass, H.D.; Gounder, K.N.; Mishra, C.S. [Fermi National Accelerator Lab., Batavia, IL (United States); Kaplan, D.M.; Luebke, W.R.; Martin, V.M.; Preston, R.S.; Sa, J.; Tanikella, V. [Northern Illinois Univ., De Kalb, IL (United States); Childers, R.; Darden, C.W.; Snodgrass, D.; Wilson, J.R. [South Carolina Univ., Columbia, SC (United States); Chen, Y.C. [Academia Sinica, Taipei (Taiwan, Province of China). Inst. of Physics]|[National Cheng Kung Univ., Tainan (Taiwan, Province of China). Inst. of Physics; Kiang, G.C.; Teng, P.K. [Academia Sinica, Taipei (Taiwan, Province of China). Inst. of Physics

    1993-06-01

    Experiment 789 is a fixed-target experiment at Fermilab designed to study low-multiplicity decays of charm and beauty. During the 1991 run. E789 collected {approx} 10{sup 9} events using an 800 GeV proton beam incident upon gold and beryllium targets. Analyses of these data include searches for b {yields} J/{psi}+{Chi} decays and {Alpha}- dependence measurements of neutral D meson production. Preliminary results from the 1991 run are presented in this paper.

  14. Beauty and charm production from Fermilab experiment 789

    International Nuclear Information System (INIS)

    Experiment 789 is a fixed-target experiment at Fermilab designed to study low-multiplicity decays of charm and beauty. During the 1991 run. E789 collected ∼ 109 events using an 800 GeV proton beam incident upon gold and beryllium targets. Analyses of these data include searches for b → J/ψ+Χ decays and Α- dependence measurements of neutral D meson production. Preliminary results from the 1991 run are presented in this paper

  15. Spectroscopy of onia and hadrons with open beauty in ATLAS

    CERN Document Server

    Henderson, RCW; The ATLAS collaboration

    2015-01-01

    Results published by the ATLAS experiment at the LHC are presented. The ATLAS discovery of the $\\chi_b(3P)$ onia state is recalled and report the new observation of an excited open beauty hadronic state, a $B_c^{\\pm}$ meson with mass $6842 \\pm 4(stat) \\pm 5(syst)$ MeV consistent with expectations for the $B_c^{\\pm}(2S)$.

  16. Search for Bs-meson oscillations in high energy hadronic beams

    International Nuclear Information System (INIS)

    Simple expressions which approximate well the differential cross sections obtained in the frames of the parton model are given for inclusive beauty hadron spectra produced in the hadron beam. The possibilities for the search of B-barS ↔ BS-meson oscillations produced in the Σ--hyperon beam by detecting decay leptons along the track are considered. The decay contribution of all the beauty B-mesons is shown to worsen considerably the possibility of the experiment, i.e., the expected error may exceed the measured value itself

  17. Beauty in the Breakdown

    Science.gov (United States)

    Brisco, Nicole

    2008-01-01

    Most human beings look at erosion as the destruction of a surface, but artists can see that erosion often creates indefinable beauty. Where do you see beauty in the breakdown? In this article, the author presents an innovative lesson that would allow students to observe both human and physical nature. In this activity students will create a work…

  18. Musings about Beauty

    Science.gov (United States)

    Kintsch, Walter

    2012-01-01

    In this essay, I explore how cognitive science could illuminate the concept of beauty. Two results from the extensive literature on aesthetics guide my discussion. As the term "beauty" is overextended in general usage, I choose as my starting point the notion of "perfect form." Aesthetic theorists are in reasonable agreement about the criteria for…

  19. Payments for scenic beauty

    OpenAIRE

    Jindal, Rohit; Kerr, John

    2007-01-01

    Although payments for scenic beauty are older than payment schemes for most other environmental services, scenic beauty itself is hard to define. It often encompasses a range of environmental services for consumptive (hunting, fishing) or non-consumptive (bird watching, boating) use. PES-1 (Payments for Environmental Services Associate Award)

  20. Charm and beauty production from Fermilab experiment 789

    Energy Technology Data Exchange (ETDEWEB)

    Brown, C.N.; Cooper, W.E.; Glass, H.D.; Gounder, K.N.; Mishra, C.S. [Fermi National Accelerator Lab., Batavia, IL (United States); Boissevain, J.; Carey, T.A.; Jansen, D.M.; Jeppesen, R.G.; Kapustinsky, J.S. [Los Alamos National Lab., NM (United States)] [and others

    1994-12-31

    Fermilab E789 is a fixed-target charm and beauty experiment which uses a 2-arm spectrometer outfitted with a silicon vertex detector to look for 2-body decays of charm and beauty. The differential cross section for production and the nuclear dependence of neutral D meson production, and the D{sup 0}/D{sup 0}-bar production asymmetry has been measured. Evidence has been seen for beauty production via the inclusive decay B {yields} J/{psi}X, by observing J/{psi} decays well downstream of the target, and have measured a differential cross section for J/{psi} from b or b-bar for 800 GeV pN collisions. (author). 4 refs., 4 figs.

  1. Meson-meson processes in strong interactions

    International Nuclear Information System (INIS)

    Based on the meson-exchange framework the present work investigates the role played by meson-meson processes in strong interaction dynamics. We concentrate on two particular topics, one representing the more fundamental aspects of meson-meson systems the other being an example for the many possible applications. Using realistic meson-exchange models for ππ- and πη-scattering the first part of this work investigates the structure of the scalar meson f0(980) and a0(980) both being of outstanding importance for our understanding of the scalar meson sector. Our model produces good agreement with the available data. Furthermore, an analysis of the pole structure of the underlying ππ- and πη-scattering amplitudes leads to an understanding of the nature and parameters of f0(980) and a0(980). It is shown that besides the observed relationship between f0(980) and a0(980) their underlying structure is quite different. The second part of our investigation deals with the role played by correlated πρ exchange in the NN interaction. Starting point are open questions concerning the structure of the πNN vertex function. In the Bonn potential of the NN interaction a rather ''hard'' πNN formfactor is required in order to be able to reproduce experimental data, in particular the deuteron properties. However, this result is in disagreement with predictions from several theoretical models requiring a much softer πNN formfactor. We are able to show that this discrepancy is removed if correlated πρ exchange is added to the Bonn potential. (orig.)

  2. Cycles of Beauty Culture: Ethnography of Beauty Clinics Commodification

    OpenAIRE

    Sri Murlianti

    2014-01-01

    Skin care is not a completely new in beauty treatments. Previously there have been other types of cultural industry which also adopted the medical science, such as cosmetic and beauty salon industries. But, skin care beauty clinic successfully introduces the services of beauty treatments which are considered the healthiest. This paper is a summary of the research on how beauty clinic quickly became a part of everyday life of its consumers. The research focused on Natasha Skin Care, a most pop...

  3. Beauty in chemistry

    Directory of Open Access Journals (Sweden)

    Peter Atkins

    2006-03-01

    Full Text Available Though hard going for the general reader and highly personal in its selectivity, Elegant Solutions: Ten Beautiful Experiments in Chemistry provides reflections of a thoughtful author that will delight chemists

  4. Beauty in chemistry

    OpenAIRE

    Peter Atkins

    2006-01-01

    Though hard going for the general reader and highly personal in its selectivity, Elegant Solutions: Ten Beautiful Experiments in Chemistry provides reflections of a thoughtful author that will delight chemists

  5. Conference Summary - Beauty 2000

    OpenAIRE

    Stone, Sheldon

    2000-01-01

    Comment: 19 pages, 8 figures; to be published in Proceedings of Beauty 2000, Kibbutz Maagan, Israel, September, 2000, edited by S. Erhan, Y. Rozen, and P. E. Schlein, Nucl. Inst. Meth. A, 2001. Corrected references

  6. Neural correlates of beauty.

    Science.gov (United States)

    Kawabata, Hideaki; Zeki, Semir

    2004-04-01

    We have used the technique of functional MRI to address the question of whether there are brain areas that are specifically engaged when subjects view paintings that they consider to be beautiful, regardless of the category of painting (that is whether it is a portrait, a landscape, a still life, or an abstract composition). Prior to scanning, each subject viewed a large number of paintings and classified them into beautiful, neutral, or ugly. They then viewed the same paintings in the scanner. The results show that the perception of different categories of paintings are associated with distinct and specialized visual areas of the brain, that the orbito-frontal cortex is differentially engaged during the perception of beautiful and ugly stimuli, regardless of the category of painting, and that the perception of stimuli as beautiful or ugly mobilizes the motor cortex differentially.

  7. Beauty and the Books.

    Science.gov (United States)

    Smith, Jeanette C.

    1990-01-01

    Discusses the use of literature in the television program "Beauty and the Beast." Suggests that, despite his inhuman appearance, the Beast has transcended the physical confinement of the tunnels and has traveled the universe of his imagination. (RS)

  8. Rare semileptonic and radiative decays of beautiful mesons

    International Nuclear Information System (INIS)

    Higher order electroweak effects can be effectively tested in B decays involving the short distance flavor changing (b→s) transition. We estimate the exclusive rates involving a virtual photon like B→K ell +ell - and real photon like B→K*γ using relativistic constituent quark model to calculate the different form factors that include recoil effects. The effects of QCD enhancement, and the resulting e-μ rate difference, as well as the long distance effects and the effect of the fourth generation in enhancing the rates are also discussed. 7 refs., 4 figs

  9. Rare semileptonic and radiative decays of beautiful mesons

    Energy Technology Data Exchange (ETDEWEB)

    Deshpande, N.G.; Trampetic, J.

    1988-11-01

    Higher order electroweak effects can be effectively tested in B decays involving the short distance flavor changing (b{yields}s) transition. We estimate the exclusive rates involving a virtual photon like B{yields}K{ell}{sup +}{ell}{sup {minus}} and real photon like B{yields}K*{gamma} using relativistic constituent quark model to calculate the different form factors that include recoil effects. The effects of QCD enhancement, and the resulting e{minus}{mu} rate difference, as well as the long distance effects and the effect of the fourth generation in enhancing the rates are also discussed. 7 refs., 4 figs.

  10. Glueballs and Hybrid Mesons

    CERN Document Server

    Michael, C

    1992-01-01

    We discuss states in the meson spectrum which have explicit gluonic components. Glueballs (with no valence quarks) and hybrid mesons (with valence quarks) are both reviewed. We present in some detail lattice simulation results. ( to appear in proceedings of QCD-20 years, Aachen Workshop)

  11. What Is Beauty?

    Institute of Scientific and Technical Information of China (English)

    胡应余

    2007-01-01

    <正> It seems that beauty and women are twins. You are joking? No, I am not. Observe for yourself. Ads on fashion flood TV screens, radio programs, magazines, newspapers, and the streets. Whether they have realized or not, women are besieged by a sea of fashions. They are taught to think that without beautiful clothes they will grow old and lose their charm. So who dares to neglect dressing up at the cost of their appearance and youth?

  12. The medicalization of beauty

    OpenAIRE

    Paulo Poli Neto; Sandra N.C. Caponi; Silvana Polchlopek

    2007-01-01

    Concern with body image and medical interventions related to physical beauty has greatly increased in the past few years. The purpose of this study is to investigate how medicine is dealing with the theme of beauty. The 2003/2004 editions of the periodicals Aesthetic Surgery Journal and Aesthetic Plastic Surgery were analyzed, in order to investigate the rationality buttressing their discourse. Three categories were prioritized for this study: definition of aesthetic plastic surgery's study o...

  13. BEAUTY'99 Conference Summary

    OpenAIRE

    Eerola, P.

    1999-01-01

    Investigations of B hadrons are expected to break new ground in measuring CP-violation effects. This series of BEAUTY conferences, originating from the 1993 conference in Liblice, has contributed significantly in developing ideas of CP-violation measurements using B hadrons and formulating and comparing critically the B-physics experiments. In the '99 conference in Bled we saw the ripening of the field and the first fruit emerging - Tevatron have produced beautiful B-physics results and more ...

  14. Chinese Beauty Rules

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Beijing beauty Zhang Zilin walked away with the Miss World 2007 crown before a partisan crowd on December 1,daz- zling the judging panel with her high-voltage smile and elegant confidence. The 23-year-old Miss China set the night alight in Sanya,in south China’s Hainan Province,when she emerged from a bevy of 106 of the world’s most beautiful women to become China’s first Miss World in 57 years

  15. The medicalization of beauty

    Directory of Open Access Journals (Sweden)

    Paulo Poli Neto

    2007-01-01

    Full Text Available Concern with body image and medical interventions related to physical beauty has greatly increased in the past few years. The purpose of this study is to investigate how medicine is dealing with the theme of beauty. The 2003/2004 editions of the periodicals Aesthetic Surgery Journal and Aesthetic Plastic Surgery were analyzed, in order to investigate the rationality buttressing their discourse. Three categories were prioritized for this study: definition of aesthetic plastic surgery's study object; beauty patterns guiding interventions; and understanding popular demand for aesthetic corrections. Discourse is sustained by biomedical rationality, structured around a disease theory and a dual construction between normal and pathological, with emphasis on biology. In the articles, the beauty patterns guiding therapeutic practices are anchored in biological norms defined through several anthropometric measures, which refer to abstract concepts of beauty, harmony, proportionality and symmetry. In this discourse, there are no references to patterns or to social norms of beauty; motivation for aesthetic intervention appears to be rooted in low self-esteem related to the aging process or to some bodily nonconformity. As per the meaning of 'medicalization' adopted herein, biomedical rationality appropriates variations or anomalies of physical appearance, thus allowing the theme to be dealt with in terms of health and disease, normal and pathological.

  16. Survival of Bc mesons in a hot plasma within a potential model

    CERN Document Server

    Alberico, W M; Czerski, P; De Pace, A; Nardi, M; Ratti, C

    2013-01-01

    We extend a previous work on the study of heavy charmonia and bottomonia in a deconfined quark-gluon plasma by considering the Bc family of mesons. With the introduction of this bound state of a charm and a beauty quark, we investigate at finite temperature the behavior of the quarkonium, in an energy region between the {\\psi} and the {\\Upsilon} states.

  17. Meson-Meson Scattering on Anisotropic Lattices

    Institute of Scientific and Technical Information of China (English)

    DU Xi-Ning; MIAO Chuan; MENG Guang-Wei; LIU Chuan

    2005-01-01

    Using the tadpole improved Wilson quark action on small, coarse, and anisotropic lattices, meson-meson scattering lengths are calculated within quenched approximation. The study covers pion-pion scattering in the I = 2 channel and kaon-pion scattering in the I = 3/2 channel. The results are extrapolated towards the chiral limit. Finite volume and finite lattice spacing errors are also analyzed and results in the infinite volume and continuum limit are obtained. Our results are compared with the results obtained using Roy equations, chiral perturbation theory, dispersion relations, and the experimental data. We also compare our results with other lattice results on the scattering lengths.

  18. Charm meson scattering cross sections by pion and rho meson

    CERN Document Server

    Lin Zi Wei; Ko, C M

    2001-01-01

    Using the local flavor SU(4) gauge invariance in the limit of vanishing vector-meson masses, we extend our previous study of charm-meson scattering cross sections by pion and rho meson, which is based only on the pseudoscalar-pseudoscalar-vector meson couplings, to include also contributions from the couplings among three vector mesons and among four particles. We find that diagrams with light-meson exchanges usually dominate the cross sections. For the processes considered previously, the additional interactions lead only to diagrams involving charm-meson exchanges and contact interactions, and the cross sections for these processes are thus not much affected. Nevertheless, these additional interactions introduce new processes with light-meson exchanges and increase significantly the total scattering cross sections of charm mesons by pion and rho meson.

  19. Mesonic effects in nuclear physics

    International Nuclear Information System (INIS)

    The relation between mesons and nucleons and the properties of nuclear matter, as presently understood, is considered in these lectures. Feynman diagrams, meson theoretical nucleon-nucleon interactions, mesonic components in nuclear wave functions, direct observation of mesonic components in NN scattering above the pion production threshold, nuclear matter theory, and pion condensation are treated. 120 references

  20. Vector-meson dominance revisited

    Directory of Open Access Journals (Sweden)

    Terschlüsen Carla

    2012-12-01

    Full Text Available The interaction of mesons with electromagnetism is often well described by the concept of vector-meson dominance (VMD. However, there are also examples where VMD fails. A simple chiral Lagrangian for pions, rho and omega mesons is presented which can account for the respective agreement and disagreement between VMD and phenomenology in the sector of light mesons.

  1. Properties of c meson

    Indian Academy of Sciences (India)

    Ajay Kumar Rai; P C Vinodkumar

    2006-05-01

    The mass spectrum of $c\\bar{b}$ meson is investigated with an effective quark-antiquark potential of the form $\\dfrac{-_{c}}{r} + Ar^{}$ with varying from 0.5 to 2.0. The and -wave masses, pseudoscalar decay constant, weak decay partial widths in spectator model and the lifetime of c meson are computed. The properties calculated here are found to be in good agreement with other theoretical and experimental values at potential index, = 1.

  2. Transversity and Meson Photoproduction

    CERN Document Server

    Goldstein, G R; Goldstein, Gary R.; Gamberg, Leonard

    2002-01-01

    Both meson photoproduction and semi-inclusive deep inelastic scattering can potentially probe transversity in the nucleon. We explore how that potential can be realized dynamically. The role of rescattering in both exclusive and inclusive meson production as a source for transverse polarization asymmetry is examined. We use a dynamical model to calculate the asymmetry and relate that to the transversity distribution of the nucleon.

  3. Why Beauty Matters

    OpenAIRE

    Rosenblat, Tanya; Mobius, Markus

    2006-01-01

    We decompose the beauty premium in an experimental labor market where “employers†determine wages of “workers†who perform a maze-solving task. This task requires a true skill which we show to be unaffected by physical attractiveness. We find a sizable beauty premium and can identify three transmission channels: (a) physically attractive workers are more confident and higher confidence increases wages; (b) for a given level of confidence, physically attractive workers are (wrongly) cons...

  4. Beauty in Hume's Viewpoint

    OpenAIRE

    Ali Salmani

    2010-01-01

    Although Hume, regarding his basic ideas, explicitly identifies beauty as a sentiment, but in some passages it is introduced not as a sentiment but as a real quality. In some other passages, it also seemed like a secondary quality. Some interpreters, just by referring to these unclear passages in Hume’s writings, offered a kind of interpretations from Hume’s basic idea of beauty that finally is incompatible with his entire philosophy. We attempt, in this paper, by presenting the Hume’s theory...

  5. Introduction to Beautiful Soup

    Directory of Open Access Journals (Sweden)

    Jeri Wieringa

    2012-12-01

    Full Text Available Beautiful Soup is a Python library for getting data out of HTML, XML, and other markup languages. Say you’ve found some webpages that display data relevant to your research, such as date or address information, but that do not provide any way of downloading the data directly. Beautiful Soup helps you pull particular content from a webpage, remove the HTML markup, and save the information. It is a tool for web scraping that helps you clean up and parse the documents you have pulled down from the web.

  6. Introduction to Beautiful Soup

    OpenAIRE

    Jeri Wieringa

    2012-01-01

    Beautiful Soup is a Python library for getting data out of HTML, XML, and other markup languages. Say you’ve found some webpages that display data relevant to your research, such as date or address information, but that do not provide any way of downloading the data directly. Beautiful Soup helps you pull particular content from a webpage, remove the HTML markup, and save the information. It is a tool for web scraping that helps you clean up and parse the documents you have pulled down from t...

  7. Who Engages with Moral Beauty?

    Science.gov (United States)

    Diessner, Rhett; Iyer, Ravi; Smith, Meghan M.; Haidt, Jonathan

    2013-01-01

    Aristotle considered moral beauty to be the "telos" of the human virtues. Displays of moral beauty have been shown to elicit the moral emotion of elevation and cause a desire to become a better person and to engage in prosocial behavior. Study 1 ("N" = 5380) shows engagement with moral beauty is related to several psychological…

  8. ARGUS results on beauty and charm

    International Nuclear Information System (INIS)

    Using the ARGUS detector at the e+e- storage ring DORIS II at DESY new results on beauty and charm physics have been obtained. With more data an update on B0B-bar0 mixing is given for the mixing parameter r = (21±6) %. The investigation of the decay B-bar0 → D*+l-ν allows a determination of the Kobayashi-Maskawa element |Vcb| = 0.052±0.011. The lifetime ratio of charged and neutral B mesons is measured to be τB+/τB0 = 1.00±0.23±0.14. In semileptonic B decays, as well as in exclusive B decays, no significant signals are found for b→u or b→s transitions. In charm physics, the spin of the D*(2459) is shown to be J=2. The enhancement, previously known as the D*(2420), seen in the final state D*(2010)+π-, is resolved into two relatively narrow resonances separated in mass by approximately 40 MeV/c2. The results of a decay angular analysis are in good agreement with the interpretation of the two states as L=1 D mesons of spin-parities 1+ and 2+. The charged isospin partner of the D*(2459)0 is observed at a mass of (2469±4±6) MeV/c2, decaying to D0π+. The isospin mass splitting is measured to be (14±5±8) MeV/c2. Finally, the first excited P-wave Ds meson has been observed in the decay D*s(2536) → D*+Ks0. (author)

  9. ρ meson decays of heavy hybrid mesons

    Science.gov (United States)

    Zhang, Liang; Huang, Peng-Zhi

    2016-07-01

    We calculate the ρ meson couplings between the heavy hybrid doublets Hh/Sh/Mh/Th and the ordinary qQ̅ doublets in the framework of the light-cone QCD sum rule. The sum rules obtained rely mildly on the Borel parameters in their working regions. The resulting coupling constants are rather small in most cases. Supported by National Natural Science Foundation of China (11105007)

  10. My Beautiful Friend

    Institute of Scientific and Technical Information of China (English)

    雷全

    2004-01-01

    I have many toys in my room.Al-though they can’t speak,I treat them asmy friends.I like playing with them.Among them,my favorite is the beautiful girl-Barbiedoll.Her name is Kelly,same as my English name.She cameto my family a year ago as my birthday gift.

  11. A Window of Beauty

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Yan Hong (front, third from the right), Mr Leo Passage, President of Pivot Point (front, second from the right) and Peng Jinzhao, President of Pivot Point—Asia Region (front, fourth from the right) with the students of the Sichuan Pivot Point Beauty Institute.

  12. Spectroscopy of beautiful baryons

    Energy Technology Data Exchange (ETDEWEB)

    Caloi, R.; Gentile, S.; Mignani, R. (Rome Univ. (Italy). Ist. di Fisica)

    1980-09-20

    By assuming a non-relativistic quark model, an estimate of the masses of the low-lying (non-strange and non-charmed) beautiful baryons is given. Electromagnetic mass splittings of the same baryons are also discussed in some detail.

  13. Hierarchy of lifetimes of charmed and beautiful hadrons

    International Nuclear Information System (INIS)

    Pre-asymptotic corrections to total hadronic widths of weak decays of charmed and beautiful hadrons are considered. The main emphasis is put on effects due to the spectator quark. The so called hybrid logarithms emerging from the domain of momenta R-2 2 Q2 (R is the hadronic size, mQ is the heavy quark mass) are taken into account, a new element of the analysis. For chamed hadrons the pre-asymptotic corrections are of order unity, and the corresponding estimates of non leptonic widths are of semiquantitative character. The hierarchy of hadronic widths for D, F mesons and Λc, Ξc(A), Ωc baryons is establish. The lifetime of Ωc0 turns out to be the smallest. The difference in lifetimes of beautiful hadrons is predicted to be definitely less than a few percent

  14. Measurement of Beauty Particle Lifetimes and Hadroproduction Cross-Section

    CERN Multimedia

    2002-01-01

    We propose an experimental search for beauty particles produced in fixed target hadronic interactions. The essential feature of the proposed experimental technique is the use of two specially designed pieces of hardware~-~a high precision ``decay detector'' and a fast secondary vertex trigger processor. If these devices perform to our expectations, we should be able to obtain sufficient data sample to address several important physics issues, including measurements of the lifetimes of charged and neutral B~mesons, the B~hadroproduction cross-section, and possibly B$^0$- $ \\bar{B} ^0 $ mixing.

  15. ON BEAUTY AND THE BEAUTIFUL IN AESTHETIC EDUCATION

    Directory of Open Access Journals (Sweden)

    Borce Kostov

    2013-06-01

    Full Text Available We titled our work “On Beauty and the Beautiful in Aesthetic Education” and we analyzed the category beautiful in function of better understanding the issues of aesthetic education.The basic point was the fact that the determination of the term beautiful is being different in both, time aspect and space aspect. Also, the authors involved in this matter have got different understanding on beautiful issue, on its essence, on its role in human development and on the development of the aesthetics and the aesthetic education.Therefore, within our work, there is an attempt to differ the approaches towards the category beautiful, to comment it, to compare it and finally to give our approach.

  16. The face, beauty, and symmetry: perceiving asymmetry in beautiful faces.

    Science.gov (United States)

    Zaidel, D W; Cohen, J A

    2005-08-01

    The relationship between bilateral facial symmetry and beauty remains to be clarified. Here, straight head-on photographs of "beautiful" faces from the collections of professional modeling agencies were selected. First, beauty ratings were obtained for these faces. Then, the authors created symmetrical left-left and right-right composites of the beautiful faces and asked a new group of subjects to choose the most attractive pair member. "Same" responses were allowed. No difference between the left-left and right-right composites was revealed but significant differences were obtained between "same" and the left-left or right-right. These results show that subjects detected asymmetry in beauty and suggest that very beautiful faces can be functionally asymmetrical. PMID:16040358

  17. Static-light meson-meson potentials

    CERN Document Server

    Bali, Gunnar

    2010-01-01

    We investigate potentials between pairs of static-light mesons in Nf=2 Lattice QCD, in different spin channels. The question of attraction and repulsion is particularly interesting with respect to the X(3872) charmonium state and charged candidates such as the Z+(4430). We employ the nonperturbatively improved Sheikholeslami-Wohlert fermion and the Wilson gauge actions at a lattice spacing a approx. 0.084 fm and a pseudoscalar mass mPS approx. 760 MeV. We use stochastic all-to-all propagator techniques, improved by a hopping parameter expansion. The analysis is based on the variational method, utilizing various source and sink interpolators.

  18. The face, beauty, and symmetry: Perceiving asymmetry in beautiful faces

    OpenAIRE

    Zaidel, Dr. Dahlia W.; Cohen, Jennifer A.

    2005-01-01

    The relationship between bilateral facial symmetry and beauty remains to be clarified. Here, straight head-on photographs of “beautiful” faces from the collections of professional modeling agencies were selected. First, beauty ratings were obtained for these faces. Then, the authors created symmetrical left-left and right-right composites of the beautiful faces and asked a new group of subjects to choose the most attractive pair member. “Same” responses were allowed. No difference between the...

  19. Burns and beauty nails

    Science.gov (United States)

    Bélanger, Richard E; Marcotte, Marie-Eve; Bégin, François

    2013-01-01

    A case involving a five-month-old girl brought to the emergency department with burns over her abdomen is described. The child was reported to have spilled two small bottles of beauty nail adhesive on her clothes while her mother was preparing dinner. After undressing the infant, the mother discovered several lesions on the child’s abdomen and quickly sought medical attention. Given the unusual circumstances of the presentation, the child was hospitalized for both treatment and supervision. The beauty nail adhesive contained cyanoacrylate. In addition to its well-appreciated adhesive capacity, cyanoacrylate, in the presence of cotton or other tissues, is known to produce an exothermic reaction that may cause burns. Cyanoacrylate-based products, due to their possible adverse effects, should be kept away from children as advised. Odd injuries should always raise concerns about the possibility of inflicted injury. PMID:24421671

  20. Small is beautiful

    Energy Technology Data Exchange (ETDEWEB)

    Schumacher, E.F.

    1973-01-01

    The author feels that ''an almost universal idolatry of gigantism'' has caused the urgent crisis of today's society. The book expresses his philosophy of the beauty of thinking in less grandiose terms. He offers some smaller-scale yet highly feasible solutions to many of the problems created by bigness--the environmental crisis, the energy shortage, the dehumanization of industrial workers, the flight from rural areas, and the decay of cities. (MCW)

  1. Burns and beauty nails

    OpenAIRE

    Richard E. Bélanger; Marcotte, Marie-Eve; Bégin, François

    2013-01-01

    A case involving a five-month-old girl brought to the emergency department with burns over her abdomen is described. The child was reported to have spilled two small bottles of beauty nail adhesive on her clothes while her mother was preparing dinner. After undressing the infant, the mother discovered several lesions on the child’s abdomen and quickly sought medical attention. Given the unusual circumstances of the presentation, the child was hospitalized for both treatment and supervision. T...

  2. Shibusa: extracting beauty

    OpenAIRE

    Adkins, Monty; Dickens, Pip

    2012-01-01

    Shibusa – Extracting Beauty celebrates a number of artistic endeavours: music, painting and the skill of making in general with particular reflection upon Japanese aesthetics. Composer, Monty Adkins and visual artist, Pip Dickens (through a Leverhulme Trust Award collaboration) investigate commonality and difference between the visual arts and music exploring aspects of rhythm, pattern, colour and vibration as well as outlining processes utilised to evolve new works within these practic...

  3. Sublimity, beauty and decorum

    OpenAIRE

    White, Luke

    2007-01-01

    This catalogue essay examines the work of two contemporary abstract painters, Maisie Kendall and Richmond Burton, who were showing together at the Royal Academy Schools Gallery in London, in Autumn 2007. It traces the fate of the "decorative" in modern art, and relates this term to Neoclassical attitudes to decorum. Tracing the turn away from decorum as a validating term in art, with the rise of the related (and gendered) notions of the sublime and the beautiful (with the privileging of the f...

  4. Politics of Beauty

    OpenAIRE

    Ken-ichi Sasaki

    2011-01-01

    I look back at the history of modern aesthetics to grasp its current situation and to propose its possibilities for the future. The early modern period, during which aesthetics came into being, was a great historical turning point for civilization. Our contemporary period shares this character, and it is worthwhile for us to consult its history in order to reflect on our civilization. Aesthetics began with Baumgarten’s proposal, which consisted in a triple subject: sensibility, beauty, an...

  5. A Beautiful Spin

    International Nuclear Information System (INIS)

    Spin is a beautiful concept that plays an ever important role in modern physics. In this talk, I start with a discussion of the origin of spin, and then turn to three themes in which spin has been crucial in subatomic physics: a lab to explore physics beyond the standard model, a tool to measure physical observables that are hard to obtain otherwise, a probe to unravel nonperturbative QCD. I conclude with some remarks on a world without spin

  6. A beautiful theory

    OpenAIRE

    Ed Nosal; Peter Rupert

    2002-01-01

    It wasn’t A Beautiful Mind—the book or the movie—that made John Forbes Nash, Jr., famous. It was his work in game theory, a theory that models strategic interactions between people as games. Before Nash, the only games theorists could get a handle on were artificial ones with no real-world applications. Nash’s insights enabled economists to expand the use of game theory to interesting practical problems.

  7. New physics with beauty

    Indian Academy of Sciences (India)

    Rahul Sinha

    2000-07-01

    We review the effects of new physics on CP asymmetries and decays of mesons. Possible sources and corresponding signals for new physics are studied briefly. We discuss how the decay mode → sℓℓ$ (and → * ℓℓ) will enable us to understand the nature of new physics. We also examine the possibility of truly clean signature of new physics – a signature based on observables alone and without hadronic uncertainties.

  8. Two beautiful new particles

    CERN Multimedia

    Antonella Del Rosso

    2012-01-01

    In beautiful agreement with the Standard Model, two new excited states (see below) of the Λb beauty particle have just been observed by the LHCb Collaboration. Similarly to protons and neutrons, Λb is composed of three quarks. In the Λb’s case, these are up, down and… beauty.   Although discovering new particles is increasingly looking like a routine exercise for the LHC experiments (see previous features), it is far from being an obvious performance, particularly when the mass of the particles is high. Created in the high-energy proton-proton collisions produced by the LHC, these new excited states of the Λb particle have been found to have a mass of, respectively, 5912 MeV/c2 and 5920 MeV/c2. In other words, they are over five times heavier than the proton or the neutron. Physicists only declare a discovery when data significantly show the relevant signal. In order to do that, they often have to analyse large samples of data. To ...

  9. Hadroproduction of Charm and Beauty

    OpenAIRE

    Karchin, Paul E.

    1997-01-01

    Recent results on the hadroproduction of charm and beauty are discussed in the context of the current theoretical and experimental status. The areas covered include production of open charm and beauty particles and charm and beauty quarkonia. Experimental results from both fixed target and colliding beam experiments are presented and compared to theoretical predictions. Predictions based on QCD perturbation theory are generally successful in explaining the shapes of differential cross section...

  10. Glueball-meson mixing

    Energy Technology Data Exchange (ETDEWEB)

    Vento, Vicente [Consejo Superior de Investigaciones Cientificas, Departamento de Fisica Teorica y Instituto de Fisica Corpuscular, Universidad de Valencia, Burjassot (Spain)

    2016-01-15

    Calculations in unquenched QCD for the scalar glueball spectrum have confirmed previous results of Gluodynamics finding a glueball at ∝1750 MeV. I analyze the implications of this discovery from the point of view of glueball-meson mixing in light of the experimental scalar spectrum. (orig.)

  11. BEAUTIFUL, SENSE OF BEAUTY AND ELEMENTS OF BEAUTY IN TURKISH “MÂNİ”

    OpenAIRE

    Bülent Kahraman Çolakoğlu

    2014-01-01

    This study underlines the “mâni” which represents anonymous folk literature reflecting Turkish cultural life. Turkish nation’s sense of beautiful and beauty, the elements of beauty which belong to beauty/beloved have been studied with reference to Turkish “mâni” in order to protect Turkish cultural treasures and ensure them to be inherited from generation to generation by functionalizing them. In the study, content analysis has been used in the process of data interpretation. 4068 “mâni”s...

  12. Beauty and Testimony

    OpenAIRE

    Hopkins, Robert

    2000-01-01

    I ask whether, and how far, it is possible legitimately to acquire the belief that a given item is beautiful on the basis of someone's testimony that it is. This is an issue that concerned Kant. Kant held that testimony could never be a legitimate source of such judgements, and clearly took his account of aesthetic judgement to explain this fact. I argue that Kant's theory does not, in fact, provide the materials for a satisfactory explanation. Was Kant at least right about the explanadum? Wh...

  13. A Corporate Beauty Contest

    OpenAIRE

    Graham, John R.; Campbell R. Harvey; Manju Puri

    2010-01-01

    We conduct beauty contest experiments, using close to 2,000 subjects to study the facial traits of CEOs. In one experiment we use pairs of photographs and find that subjects rate CEO faces as appearing more "competent" and less "likable" than non-CEO faces. Another experiment matches CEOs from large firms against CEOs from smaller firms and finds large-firm CEOs look more competent and likable. In a third experiment, subjects numerically rate the facial traits of CEOs. We find that executive ...

  14. A Beautiful Story

    Science.gov (United States)

    García-Moliner, Federico

    In 1981, a time when our science administrators still believed that small is beautiful, I was sent to Cuba with a very simple mission: To establish contact with the solid state physicists at the University of Havana in order to identify affinities and prepare the ground for possible collaborations. I count this as one of the most fortunate events in my professional and human experience. It marked the beginning of a long lasting and very fruitful collaboration as well as of many brotherly friendships that have significantly contributed to the enrichment of my life as a human being.

  15. She Looks so Beautiful

    OpenAIRE

    Karen de Kock

    2008-01-01

    This article offers a story that illustrates how the medium of music is able to provide comfort, even in extreme cases of hopelessness, when all other efforts seem futile. I will relate how the creative act of music-making within an institutional setting, was able to provide comfort to a self-injurious female psychiatric client, who had been institutionalised all her life, to restore a sense of beauty and dignity which had been lost. The music that was created in the moment was also able to c...

  16. Sublime Views and Beautiful Explanations

    DEFF Research Database (Denmark)

    Barry, Daved; Meisiek, Stefan; Hatch, Mary Jo

    To create a generative theory that provides beautiful explanations and sublime views requires both a crafts and an art approach to scientific theorizing. The search for generativity leads scholars to perform various theorizing moves between the confines of simple, yet eloquent beauty...

  17. Escaping Beauty through moral narratives

    DEFF Research Database (Denmark)

    Sloth, Erik

    2010-01-01

    This study investigate through ethnographic studies the shared cultural meanings expressed about human beauty. How is sense making about the notion of beauty constructed, verballized and negotiated in a group of young females between 24 and 26 years old. Furthermore the study discuss and elaborate...

  18. Light Meson Distribution Amplitudes

    CERN Document Server

    Arthur, R; Brommel, D; Donnellan, M A; Flynn, J M; Juttner, A; de Lima, H Pedroso; Rae, T D; Sachrajda, C T; Samways, B

    2010-01-01

    We calculated the first two moments of the light-cone distribution amplitudes for the pseudoscalar mesons ($\\pi$ and $K$) and the longitudinally polarised vector mesons ($\\rho$, $K^*$ and $\\phi$) as part of the UKQCD and RBC collaborations' $N_f=2+1$ domain-wall fermion phenomenology programme. These quantities were obtained with a good precision and, in particular, the expected effects of $SU(3)$-flavour symmetry breaking were observed. Operators were renormalised non-perturbatively and extrapolations to the physical point were made, guided by leading order chiral perturbation theory. The main results presented are for two volumes, $16^3\\times 32$ and $24^3\\times 64$, with a common lattice spacing. Preliminary results for a lattice with a finer lattice spacing, $32^3\\times64$, are discussed and a first look is taken at the use of twisted boundary conditions to extract distribution amplitudes.

  19. Photoproduction of Pseudoscalar Mesons

    CERN Document Server

    Arndt, R A; O'Rielly, G V; Strakovsky, I I; Workman, R L

    2003-01-01

    Experiments that study the photoproduction of pseudoscalar mesons; pions, etas and kaons, have the potential to increase our knowledge of baryon and hyperon resonance properties. Recent experiments at JLab, Mainz, GRAAL, and Bonn are beginning to produce results in the form of polarization and asymmetry measurements and determinations of the differential and integrated cross sections. These new data are essential to the performance of Partial-Wave Analyses that are less model dependent and coupled-channels calculations that incorporate unitarity dynamically,combining hadronic reaction channels together with electromagnetic processes. This approach is necessary to extract resonance properties and may lead to the identification of missing, but predicted, resonances. Some recent experimental and phenomenological results for single and double pseudoscalar meson photoproduction are discussed.

  20. Exotic meson challenges rules

    International Nuclear Information System (INIS)

    A heavy particle with an unusual decay pattern discovered by the Belle experiment at KEK in Japan is the latest addition to the meson family tree. If we had to name a modern-day Mendeleev, his name would surely be Murray Gell-Mann. In the 1960s, faced with a bewildering array of particles called hadrons that had been turning up in high-energy experiments around the world, Gell-Mann proposed that the particles were combinations of a few fundamental entities called quarks. This idea brought order into the hadronic chaos, a feat for which Gell-Man was awarded the 1969 Nobel Prize for Physics. Ever since the quark model was introduced, physicists have wanted to find out how the six different types of quarks - up (u), down (d), strange (s), charm (c), bottom (b) and top (t) - combine to form the hadrons we observe. The simple hadronic structures that we see are easy to define: mesons such as pions and kaons consist of a quark and an antiquark pair, while baryons such as protons and neutrons are made up of three quarks or three antiquarks. But the theory that describes quarks, quantum chromodynamics (QCD), also permits particles containing four or more quarks. Indeed, a meson can be more generally defined as a hadron that has an integer value of intrinsic angular momentum in quantum units, while baryons have half-integer multiples of spin. Discovering such exotic hadrons, particularly mesons with more than the minimal quark-antiquark structure, would therefore provide crucial information for our understanding of the strong force. In fact, physicists thought they had glimpsed a five-quark state called a 'pentaquark' in 2003. Sadly this excitement looks as if it was misplaced, since the latest results from dedicated experimental searches suggest that pentaquarks are a purely statistical phenomenon (see Physics World May p7: print edition only). (U.K.)

  1. Compositeness of the strange, charm and beauty odd parity $\\Lambda$ states

    CERN Document Server

    Garcia-Recio, C; Nieves, J; Salcedo, L L; Tolos, L

    2015-01-01

    We study the dependence on the quark mass of the compositeness of the lowest-lying odd parity hyperon states. Thus, we pay attention to $\\Lambda-$like states in the strange, charm and beauty, sectors which are dynamically generated using a unitarized meson-baryon model. In the strange sector we use an SU(6) extension of the Weinberg-Tomozawa meson-baryon interaction, and we further implement the heavy-quark spin symmetry to construct the meson-baryon interaction when charmed or beauty hadrons are involved. In the three examined flavor sectors, we obtain two $J^P=1/2^-$ and one $J^P=3/2^-$ $\\Lambda$ states. We find that the $\\Lambda$ states which are bound states (the three $\\Lambda_b$) or narrow resonances (one $\\Lambda(1405)$ and one $\\Lambda_c(2595)$) are well described as molecular states composed of $s$-wave meson-baryon pairs. The $\\frac{1}{2}^-$ wide $\\Lambda(1405)$ and $\\Lambda_c(2595)$ as well as the $\\frac{3}{2}^-$ $\\Lambda(1520)$ and $\\Lambda_c(2625)$ states display smaller compositeness and so they...

  2. A theory of scalar mesons

    Energy Technology Data Exchange (ETDEWEB)

    Hooft, G. t' [Institute for Theoretical Physics, Utrecht University, and Spinoza Institute, Postbus 8000, 3508 TA Utrecht (Netherlands); Isidori, G. [Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); INFN, Laboratori Nazionali di Frascati, Via E.Fermi 40, 00044 Frascati (Italy); Maiani, L. [Dipartimento di Fisica, Universita di Roma ' La Sapienza' , P.le A. Moro 2, 00185 Roma (Italy); INFN, Sezione di Roma ' La Sapienza' , P.le A. Moro 2, 00185 Roma (Italy); Polosa, A.D. [INFN, Sezione di Roma ' La Sapienza' , P.le A. Moro 2, 00185 Roma (Italy)], E-mail: antonio.polosa@cern.ch; Riquer, V. [INFN, Sezione di Roma ' La Sapienza' , P.le A. Moro 2, 00185 Roma (Italy)

    2008-05-08

    We discuss the effect of the instanton induced, six-fermion effective Lagrangian on the decays of the lightest scalar mesons in the diquark-antidiquark picture. This addition allows for a remarkably good description of light scalar meson decays. The same effective Lagrangian produces a mixing of the lightest scalars with the positive parity qq-bar states. Comparing with previous work where the qq-bar mesons are identified with the nonet at 1200-1700 MeV, we find that the mixing required to fit the mass spectrum is in good agreement with the instanton coupling obtained from light scalar decays. A coherent picture of scalar mesons as a mixture of tetraquark states (dominating in the lightest mesons) and heavy qq-bar states (dominating in the heavier mesons) emerges.

  3. BEAUTIFUL, SENSE OF BEAUTY AND ELEMENTS OF BEAUTY IN TURKISH “MÂNİ”

    Directory of Open Access Journals (Sweden)

    Bülent Kahraman Çolakoğlu

    2014-08-01

    Full Text Available This study underlines the “mâni” which represents anonymous folk literature reflecting Turkish cultural life. Turkish nation’s sense of beautiful and beauty, the elements of beauty which belong to beauty/beloved have been studied with reference to Turkish “mâni” in order to protect Turkish cultural treasures and ensure them to be inherited from generation to generation by functionalizing them. In the study, content analysis has been used in the process of data interpretation. 4068 “mâni”s which are in the source tagged with “Demir, Necati (2013, Türk Mânileri, Ankara: Gazi Kitabevi” have been examined and they have been analyzed and assessed in line with the predetermined purpose. With this study, it is consolidated that the Turks have always had advanced sense of beauty; they have always been a nation who has a taste for beauty and taste and sense of aesthetic since the old historical periods. It is observed that the poetic themes of hair, eyebrow, eyelash, eye, beauty spot, cheek-dimple, face, cheek-dewlap, waist, heel, skin, age, speech, smile, smell, jewellery/ornament, deportment, coquetry/manner/affection are used as elements of beauty in Turkish “mâni”.

  4. Is better beautiful or is beautiful better? Exploring the relationship between beauty and category structure.

    Science.gov (United States)

    Sanders, Megan; Davis, Tyler; Love, Bradley C

    2013-06-01

    We evaluate two competing accounts of the relationship between beauty and category structure. According to the similarity-based view, beauty arises from category structure such that central items are favored due to their increased fluency. In contrast, the theory-based view holds that people's theories of beauty shape their perceptions of categories. In the present study, subjects learned to categorize abstract paintings into meaningfully labeled categories and rated the paintings' beauty, value, and typicality. Inconsistent with the similarity-based view, beauty ratings were highly correlated across conditions despite differences in fluency and assigned category structure. Consistent with the theory-based view, beautiful paintings were treated as central members for categories expected to contain beautiful paintings (e.g., art museum pieces), but not in others (e.g., student show pieces). These results suggest that the beauty of complex, real-world stimuli is not determined by fluency within category structure but, instead, interacts with people's prior knowledge to structure categories. PMID:23242799

  5. Heavy meson in nuclear medium

    CERN Document Server

    Tolos, L; Garcia-Recio, C; Molina, R; Nieves, J; Oset, E; Ramos, A

    2010-01-01

    The properties of charmed mesons in dense matter are studied using a unitary coupled-channel approach in the nuclear medium which takes into account Pauli-blocking effects and meson self-energies in a self-consistent manner. We obtain the open-charm meson spectral functions in this dense nuclear environment, and discuss their implications on hidden charm and charm scalar resonances and on the formation of $D$-mesic nuclei at FAIR.

  6. Charmed mesons in nuclear matter

    CERN Document Server

    Tolos, L; Garcia-Recio, C; Oset, E; Molina, R; Nieves, J; Ramos, A

    2010-01-01

    We obtain the properties of charmed mesons in dense matter using a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent manner. We study the behaviour of dynamically-generated baryonic resonances together with the open-charm meson spectral functions in this dense nuclear environment. We discuss the implications of the in-medium properties of open-charm mesons on the $D_{s0}(2317)$ and the predicted X(3700) scalar resonances, and on the formation of $D$-mesic nuclei.

  7. Rare B Meson Decays With Omega Mesons

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Lei; /Colorado U.

    2006-04-24

    Rare charmless hadronic B decays are particularly interesting because of their importance in understanding the CP violation, which is essential to explain the matter-antimatter asymmetry in our universe, and of their roles in testing the ''effective'' theory of B physics. The study has been done with the BABAR experiment, which is mainly designed for the study of CP violation in the decays of neutral B mesons, and secondarily for rare processes that become accessible with the high luminosity of the PEP-II B Factory. In a sample of 89 million produced B{bar B} pairs on the BABAR experiment, we observed the decays B{sup 0} {yields} {omega}K{sup 0} and B{sup +} {yields} {omega}{rho}{sup +} for the first time, made more precise measurements for B{sup +} {yields} {omega}h{sup +} and reported tighter upper limits for B {yields} {omega}K* and B{sup 0} {yields} {omega}{rho}{sup 0}.

  8. Beauty physics in lattice gauge theory

    International Nuclear Information System (INIS)

    We summarize the present status of lattice gauge theory computations of the leptonic decay constants fD and fB. The various sources of systematic errors are explained in a manner easily understood by the non-expert. The results obtained by the different groups are then systematically compared. As a result, we derive estimates for fD and fB in the quenched approximation through an appropriate combination of the data available from the different groups. Since we account for a possible lattice spacing dependence, the final errors are quite large. However, it is now well known how these uncertainties can be reduced. For the decay constant of heavy-light pseudoscalar mesons with masses of 1-2 GeV, an interesting comparison of a full QCD result with the corresponding simulation in the quenched approximation can be done. Effects of sea quarks of mass ms are below the statistical accuracy of these simulations. Related quantities, like B-parameters, the spectrum of beauty-hadrons and the breaking of the QCD string are discussed briefly. (orig.)

  9. Charm and beauty production at LHC

    CERN Document Server

    Carrer, N

    2003-01-01

    We define here the present ALICE baseline for what concerns the heavy flavour production cross sections at LHC and the kinematical distributions of the heavy quark pairs. We start by qualitatively assessing the Bjorken x regimes accessible with charm and beauty measurements at LHC with ALICE (Section 1). In Section 2 we report the most recent results (and the uncertainties) of the next-to-leading order (NLO) pQCD calculations for the cross sections in pp collisions at LHC energies. These results are extrapolated to Pb-Pb collisions in Section 3.1 and to p-Pb collisions in Section 3.2, taking into account nuclear shadowing and parton intrinsic transverse momentum broadening. Heavy quark kinematics as given by the NLO pQCD calculation are reported in Section 4. We tuned the PYTHIA event generator in order to reproduce such results for what concerns the c and b quarks transverse momentum distributions (Section 5). Finally, we report the yields and transverse momentum distributions for D and B mesons (section 6).

  10. MesonNet Workshop on Meson Transition Form Factors

    CERN Document Server

    Czerwinski, E; Hanhart, C; Kubis, B; Kupsc, A; Leupold, S; Moskal, P; Schadmand, S

    2012-01-01

    The mini-proceedings of the Workshop on Meson Transition Form Factors held in Cracow from May 29th to 30th, 2012 introduce the meson transition form factor project with special emphasis on the interrelations between the various form factors (on-shell, single off-shell, double off-shell). Short summaries of the talks presented at the workshop follow.

  11. Symmetry and Beauty in Plato

    OpenAIRE

    Lloyd, David R.

    2010-01-01

    Plato writes about Beauty in many of his dialogues, particularly in the Symposium, but he has no word equivalent to our "Symmetry", and this concept was not then formalised. Nevertheless, there are indications that some aspects of the concept were understood, if only intuitively. Plato has a very abstract concept of beauty, and when he uses "beauty" to characterise the so-called "Platonic Solids" in the Timaeus, he seems to be emphasising at least their regularity. It can be argued that the w...

  12. Beauty and Astrophysics

    Science.gov (United States)

    Bessell, Michael S.

    2000-08-01

    Spectacular colour images have been made by combining CCD images in three different passbands using Adobe Photoshop. These beautiful images highlight a variety of astrophysical phenomena and should be a valuable resource for science education and public awareness of science. The wide field images were obtained at the Siding Spring Observatory (SSO) by mounting a Hasselblad or Nikkor telephoto lens in front of a 2K × 2K CCD. Options of more than 30 degrees or 6 degrees square coverage are produced in a single exposure in this way. Narrow band or broad band filters were placed between lens and CCD enabling deep, linear images in a variety of passbands to be obtained. We have mapped the LMC and SMC and are mapping the Galactic Plane for comparison with the Molonglo Radio Survey. Higher resolution images have also been made with the 40 inch telescope of galaxies and star forming regions in the Milky Way.

  13. Beauty Or Health? A Personal View

    OpenAIRE

    Riji, Haliza Mohd

    2006-01-01

    This paper deals with the question of beauty and health in women. It discusses changing definitions of beauty as a result of influences from the entertainment, beauty and health product industries. Advertisements are seen to be major players in defining beauty through promotion of cosmetic, skin, hair and slimming products. Concerns relating to beauty become inculcated in girls through the process of socialisation as they mature into womanhood. The media plays a significant role in portraying...

  14. Exotic meson spectroscopy with CLAS

    Energy Technology Data Exchange (ETDEWEB)

    Adams, G.; Napolitano, J. [Rensselaer Polytechnic Inst., Troy, NY (United States)

    1994-04-01

    The identification and study of mesons with explicit gluonic degrees of freedom will provide major constraints on nonperturbative QCD and models thereof. CLAS will provide a unique opportunity for studying these resonances by measuring photoproduction of multi-meson final states.

  15. The light meson spectroscopy program

    Directory of Open Access Journals (Sweden)

    Smith Elton S.

    2014-06-01

    Full Text Available Recent discoveries of a number of unexpected new charmomium-like meson states at the BaBar and Belle B-factories have demonstrated how little is still known about meson spectroscopy. In this talk we will review recent highlights of the light quark spectroscopy from collider and fixed target experiments.

  16. Heavy meson fragmentation at LHC

    Directory of Open Access Journals (Sweden)

    M. A. Gomshi Nobary

    2003-06-01

    Full Text Available   Large Hadron Collider (LHC at CERN will provide excellent opportunity to study the production and decay of heavy mesons and baryons with high statistics. We aim at the heavy mesons in this work and calculate their fragmentation functions consistent with this machine and present their total fragmentation probabilities and average fragmentation parameters.

  17. Exotic mesons: status and future

    OpenAIRE

    Klempt, Eberhard

    2007-01-01

    The evidence for the existence of mesons with exotic quantum numbers and of hybrid candidates with non-exotic quantum numbers is critically reviewed, including candidates with hidden charm. Aims and methods of future searches for hybrid mesons are briefly discussed.

  18. Meson resonances on the lattice

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, Robert G. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

    2016-06-01

    There has been recent, significant, advances in the determination of the meson spectrum of QCD. Current efforts have focused on the development and application of finite-volume formalisms that allow for the determination of scattering amplitudes as well as resonance behavior in coupled channel systems. I will review some of these recent developments, and demonstrate the viability of the method in meson systems

  19. Meson Resonances from Lattice QCD

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, Robert G. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

    2016-06-01

    There has been recent, significant, advances in the determination of the meson spectrum of QCD. Current efforts have focused on the development and application of finite-volume formalisms that allow for the determination of scattering amplitudes as well as resonance behavior in coupled channel systems. I will review some of these recent developments, and demonstrate the viability of the method in meson systems.

  20. K^* Mesons and Nucleon Strangeness

    OpenAIRE

    Barz, L. L.; Forkel, H.; Hammer, H. -W.; Navarra, F. S.; Nielsen, M; Ramsey-Musolf, M. J.

    1998-01-01

    We study contributions to the nucleon strange quark vector current form factors from intermediate states containing K^* mesons. We show how these contributions may be comparable in magnitude to those made by K mesons, using methods complementary to those employed in quark model studies. We also analyze the degree of theoretical uncertainty associated with K^* contributions.

  1. The light meson spectroscopy program

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Elton S. [JLAB

    2014-06-01

    Recent discoveries of a number of unexpected new charmomium-like meson states at the BaBar and Belle B-factories have demonstrated how little is still known about meson spectroscopy. In this talk we will review recent highlights of the light quark spectroscopy from collider and fixed target experiments.

  2. The. eta. -meson mass

    Energy Technology Data Exchange (ETDEWEB)

    Plouin, F.; Beurtey, R.; Boivin, M.; Milleret, G.; Nakach, A. (Lab. National Saturne, 91 - Gif-sur-Yvette (France)); Fleury, P. (Lab. de Physique Nucleaire et Hautes Energies, Ecole Polytechnique, 91 - Palaiseau (France)); Bachelier, D.; Boyard, J.L.; Hennino, T. (Inst. de Physique Nucleaire, 91 - Orsay (France)); Boudard, A.; Mayer, B. (DAPNIA/SPN, C.E. de Saclay, 91 - Gif-sur-Yvette (France)); Briscoe, W. (Dept. of Physics, George Washington Univ., Washington, DC (United States)); Kessler, R.; Nefkens, B.M.K.; Pillai, C.; Whitten, C. (Dept. of Physics, UCLA, Los Angeles, CA (United States)); Moalem, A. (Ben Gurion Univ. of the Negev, Beer Sheva (Israel)); Wilkin, C. (Univ. Coll. London (United Kingdom))

    1992-02-20

    The mass of the {eta} meson has been measured through the study of the dp{yields}{sup 3}He {eta} reaction near threshold, the beam having been calibrated through comparison with three other nuclear reactions. The value obtained is m{sub {eta}}=547.30{+-}0.15 MeV/c{sup 2}, where the error bar includes both systematic and statistical effects. This is much more precise and significantly lower than the Particle Data Group average, though it is consistent with a previous counter experiment. (orig.).

  3. Taxi Drivers and Beauty Contests

    OpenAIRE

    Camerer, Colin F

    1997-01-01

    The trading floor of the New York Stock Exchange. The British economist John Maynard Keynes likened playing the market to voting for the prettiest face in a beauty contest; hence the second part of this article’s title.

  4. Physics Opportunities with Meson Beams

    CERN Document Server

    Briscoe, William J; Haberzettl, Helmut; Manley, D Mark; Naruki, Megumi; Strakovsky, Igor I; Swanson, Eric S

    2015-01-01

    Over the past two decades, meson photo- and electro-production data of unprecedented quality and quantity have been measured at electromagnetic facilities worldwide. By contrast, the meson-beam data for the same hadronic final states are mostly outdated and largely of poor quality, or even nonexistent, and thus provide inadequate input to help interpret, analyze, and exploit the full potential of the new electromagnetic data. To reap the full benefit of the high-precision electromagnetic data, new high-statistics data from measurements with meson beams, with good angle and energy coverage for a wide range of reactions, are critically needed to advance our knowledge in baryon and meson spectroscopy and other related areas of hadron physics. To address this situation, a state of-the-art meson-beam facility needs to be constructed. The present paper summarizes unresolved issues in hadron physics and outlines the vast opportunities and advances that only become possible with such a facility.

  5. Chiral Quark Model of Mesons

    CERN Document Server

    Wang, X J; Wang, Xiao-Jun; Yan, Mu-Lin

    1999-01-01

    We study SU(3)$_L\\timesSU(3)_R$ chiral quark model of mesons up to next leading order of $1/N_c$ expansion. Composite vector and axial-vector mesons resonances are introduced via non-linear realization of chiral SU(3) and vector meson dominant. Effects of one-loop graphs of pseudoscalar, vector and axial-vector mesons is calculated systematically and the significant results are obtained. Correction of effective gluon interaction is studied too. The light quark masses are introduced via new mechanism which agree with phenomenology and the requirement of chiral symmetry. Up to powers four of derivatives, chiral effective lagrangian of mesons is derived and evaluated to next leading order of $1/N_c$. Low energy limit of the model is examined. Ten low energy coupling constants $L_i(i=1,2,...,10)$ in ChPT are obtained and agree with ChPT well.

  6. Success: Talent, Intelligence or Beauty?

    OpenAIRE

    Gergaud, Olivier; GINSBURGH, Victor

    2010-01-01

    We analyze the Celebrity 100 annual list of the world’s most “powerful celebrities” compiled and published by Forbes Magazine. The lists provide an interesting collection of people, that includes their earnings, and the perception of citizens concerning the attributes that made them become celebrities. We analyze the relationship between their earnings and the perceptions on their intelligence, talent, beauty and other attributes, and show that though beauty plays a role, intelligence and tal...

  7. Beauty and Health: Anthropological Perspectives

    OpenAIRE

    Edmonds, Alexander

    2008-01-01

    This essay, written as a ‘teaser’ for an up-coming symposium, reflects on how human beauty can be understood from an anthropological and medical anthropological perspective. First, it considers how aesthetic and healing rationales can conflict or merge in a variety of medical technologies and health practices. Second, it discusses beauty in relation to the socioeconomic transformations of modernity and globalization. It suggests the need for a theoretical framework that departs from a strictl...

  8. THE BEAUTY AND THE SUBLIME

    OpenAIRE

    Bárbara Maria Brandão Guatimosim

    2008-01-01

    The text approaches the beauty and the sublime under the perspective of its intersections and of its function as barrier (the beauty), and as path to the reaching of desire (the sublime). From the kantian contribution to the notion of the Sublime along with the anxiety affect witch characterizes it, the concept of sublimation can be taken as a form of well saying, witch participates of a tragic-baroque esthetic, according with an impure desire ethic. Thereafter the text approaches the consequ...

  9. Measurements of observables in the pion-nucleon system, nuclear a- dependence of heavy quark production and rare decays of D and B mesons

    Energy Technology Data Exchange (ETDEWEB)

    Sadler, M.E.; Isenhower, L.D.

    1992-02-15

    This report discusses research on the following topics: pion-nucleon interactions; detector tomography facility; nuclear dependence of charm and beauty quark production and a study of two-prong decays of neutral D and B mesons; N* collaboration at CEBAF; and pilac experiments. (LSP)

  10. Measurements of observables in the pion-nucleon system, nuclear a- dependence of heavy quark production and rare decays of D and B mesons

    International Nuclear Information System (INIS)

    This report discusses research on the following topics: pion-nucleon interactions; detector tomography facility; nuclear dependence of charm and beauty quark production and a study of two-prong decays of neutral D and B mesons; N* collaboration at CEBAF; and pilac experiments

  11. Meson Spectroscopy at COMPASS

    CERN Document Server

    Grube, Boris

    2015-01-01

    The COmmon Muon and Proton Apparatus for Structure and Spectroscopy (COMPASS) is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron (SPS) aimed at studying the structure and spectrum of hadrons. The two-stage spectrometer has a good acceptance for charged as well as neutral particles over a wide kinematic range and thus allows to access a wide range of reactions. Light mesons are studied with negative (mostly $\\pi^-$) and positive ($p$, $\\pi^+$) hadron beams with a momentum of 190 GeV/$c$. The spectrum of light mesons is investigated in various final states produced in diffractive dissociation reactions at squared four-momentum transfers to the target between 0.1 and 1.0 $(\\text{GeV}/c)^2$. The flagship channel is the $\\pi^-\\pi^+\\pi^-$ final state, for which COMPASS has recorded the currently largest data sample. These data not only allow to measure the properties of known resonances with high precision, but also to search for new states. Among these is a new resonance-like signal, t...

  12. Meson Spectroscopy at COMPASS

    CERN Document Server

    ,

    2016-01-01

    The goal of the COMPASS experiment at CERN is to study the structure and dynamics of hadrons. The two-stage spectrometer used by the experiment has large acceptance and covers a wide kinematic range for charged as well as neutral particles and can therefore measure a wide range of reactions. The spectroscopy of light mesons is performed with negative (mostly $\\pi^-$) and positive ($p$, $\\pi^+$) hadron beams with a momentum of 190 GeV/$c$. The light-meson spectrum is measured in different final states produced in diffractive dissociation reactions with squared four-momentum transfer $t$ to the target between 0.1 and 1.0 $(\\text{GeV}/c)^2$. The flagship channel is the $\\pi^-\\pi^-\\pi^+$ final state, for which COMPASS has recorded the currently world's largest data sample. These data not only allow to measure the properties of known resonances with high precision, but also to observe new states. Among these is a new axial-vector signal, the $a_1(1420)$, with unusual properties. Novel analysis techniques have been...

  13. Meson radiobiology and therapy

    International Nuclear Information System (INIS)

    High-linear energy transfer radiation (neutrons, heavy ions, and pions) have a greater relative biological effectiveness than low-linear energy transfer radiation by depositing a high density of ionization in irradiated cells. This overcomes the protective effect of oxygen; decreases the variation in sensitivity among the several stages of the cell cycles; and, inhibits the repair of sublethal damage as compared to x-rays, gamma rays, electrons and protons. Negative pi mesons (pions), appear particularly suited for radiation therapy as their penetration and depth-dose profiles lend themselves to shaping the high dose area to the tumor size and location. Preliminary biological experiments with pions produced at the Los Alamos Meson Physics Facility studied cell survival at various radiation depths and cell cycle sensitivity. Histologic study of data from the first human experiments indicated severe tumor cell destruction by pions as compared to x-rays in treating malignant melanoma skin nodules, without increased effects on dermal elements. (U.S.)

  14. Beauty Or Health? A Personal View.

    Science.gov (United States)

    Riji, Haliza Mohd

    2006-01-01

    This paper deals with the question of beauty and health in women. It discusses changing definitions of beauty as a result of influences from the entertainment, beauty and health product industries. Advertisements are seen to be major players in defining beauty through promotion of cosmetic, skin, hair and slimming products. Concerns relating to beauty become inculcated in girls through the process of socialisation as they mature into womanhood. The media plays a significant role in portraying the meaning of beauty through its representation of women. These influences largely influence and alter women's perceptions of their body image and in trying to meet the goals of beauty as represented by the media. This may result in dissatisfaction with their body image. Advertisements can encourage women to indulge in smoking as a fashionable trend or opt for plastic surgery in attempts to acquire beauty. This paper concludes with implications of the issues relating to changing perceptions of beauty and suggests recommendations. PMID:26998213

  15. Photon-meson transition form factors of light pseudoscalar mesons

    OpenAIRE

    Xiao, Bo-Wen; Ma, Bo-Qiang

    2005-01-01

    The photon-meson transition form factors of light pseudoscalar mesons $\\pi ^{0}$, $\\eta$, and $\\eta ^{\\prime}$ are systematically calculated in a light-cone framework, which is applicable as a light-cone quark model at low $Q^{2}$ and is also physically in accordance with the light-cone pQCD approach at large $Q^{2}$. The calculated results agree with the available experimental data at high energy scale. We also predict the low $Q^{2}$ behaviors of the photon-meson transition form factors of ...

  16. Eta'-meson as pseudoscalar gluonium

    International Nuclear Information System (INIS)

    It is proved the sum rules of quantum chromodynamics for a current constructed of the gluon field operators are saturated by the eta'-meson. The meson mass is estimated and its residue in the gluon current. There is a considerable difference between the eta'-meson as gluon and the classical quark states such as the delta-meson. (orig.)

  17. She Looks so Beautiful

    Directory of Open Access Journals (Sweden)

    Karen de Kock

    2008-07-01

    Full Text Available This article offers a story that illustrates how the medium of music is able to provide comfort, even in extreme cases of hopelessness, when all other efforts seem futile. I will relate how the creative act of music-making within an institutional setting, was able to provide comfort to a self-injurious female psychiatric client, who had been institutionalised all her life, to restore a sense of beauty and dignity which had been lost. The music that was created in the moment was also able to carry and support all the individuals who were creating it - even in the most desperate moments where those that were supposed to be "in command" were experiencing a sense of uncertainty. The story further demonstrates how a client, a care-worker and a therapist, three individuals from very diverse backgrounds and life circumstances, were able to transcend their different histories to come together and connect on a level which they have not been able to do outside the music therapy room.

  18. LEP measurements on production, mass, lifetime of beauty particles

    International Nuclear Information System (INIS)

    Present knowledge about the individual properties of the different beauty particles is discussed using the results of the LEP experiments. Individual lifetimes for Bd0 and B+ are found to be equal within 10% whilst a 15% precision is reached for Bs0 and Λb. The Λb lifetime is found to be smaller than τB+ with a 2.7 σ significance. The production rate of each of these particles is measured at the 20% level. Preliminary evidence for Ξb production has been reported. Finally, the Bs0 meson mass has been measured to be 5373 ± 4 MeV/c2. (author) 24 refs., 9 figs., 5 tabs

  19. Production of Pseudoscalar Mesons

    CERN Document Server

    Briscoe, W J; Strakovsky, I I; Workman, R L

    2003-01-01

    Experiments that study the hadronic and electromagnetic production of the pseudoscalar mesons -- pions, etas and kaons, contribute to our knowledge of the properties of baryon and hyperon resonances. Fixed-target programs at hadronic facilities such as BNL-AGS have been phased out. However, the availability of modern experimental facilities with pseudo-monochromatic or tagged medium-energy photon beams at GRAAL, SPring-8, Bonn, Mainz, and Jefferson Lab, together with LEGS, Max-Lab, and HIGS at lower energies, are beginning to produce high-quality results. These new data have smaller statistical uncertainties and better understood systematic uncertainties, than those obtained at the older bremsstrahlung facilities, for measurements of differential and integrated cross sections, as well as polarization and asymmetry. Experimental results are compared with the predictions of QCD-based approaches, such as the lattice-gauge calculations of baryon properties, and Chiral Perturbation Theory applied to threshold phot...

  20. Vector mesons in matter

    Indian Academy of Sciences (India)

    Gy Wolf

    2006-04-01

    One consequence of the chiral restoration is the mixing of parity partners. We look for a possible signature of the mixing of vector and axial vector mesons in heavy-ion collisions. We suggest an experimental method for its observation. The dynamical evolution of the heavy-ion collision is described by a transport equation of QMD-type evolving nucleons, * and resonances, ’s and $\\sum$ baryons, and furthermore, ’s, ’s ’s ’s ’s and kaons with their isospin degrees of freedom. The input cross-sections and resonance parameters of the model are fitted to the available nucleon–nucleon and pion–nucleon cross-sections.

  1. Cycles of Beauty Culture: Ethnography of Beauty Clinics Commodification

    Directory of Open Access Journals (Sweden)

    Sri Murlianti

    2014-12-01

    Full Text Available Skin care is not a completely new in beauty treatments. Previously there have been other types of cultural industry which also adopted the medical science, such as cosmetic and beauty salon industries. But, skin care beauty clinic successfully introduces the services of beauty treatments which are considered the healthiest. This paper is a summary of the research on how beauty clinic quickly became a part of everyday life of its consumers. The research focused on Natasha Skin Care, a most popular beauty clinic in Indonesia at the moment. According to Richard Johnson, the process of a culture industry reaches the society through a communication that in form a pattern cyclic communications. The stages in the pattern are interconnected but slipped, each stage is affecting others but are not specified in an uncertain manner; between the producer of culture industry with its consumers. This study is a multidiscipline research using three methods of interpretation namely ethnography, discourses analysis, and social hermeneutic study.Klinik kecantikan bukanlah budaya yang benar-benar baru dalam perawatan kecantikan. Sebelumnya telah ada jenis industri budaya lain yang juga mengadopsi ilmu kedokteran, seperti industri kosmetik dan salon kecantikan. Namun klinik kecantikan sukses menyandang predikat sebagai jasa perawatan kecantikan yang dianggap paling sehat. Tulisan ini merupakan rigkasan penelitian tentang bagaimana klinik kecantikan begitu cepat menjadi bagian hidup sehari–hari masyarakat konsumennya. Fokus penelitian ini adalah Natasha Skin Care, sebuah klinik kecantikan paling popular di Indonesia saat ini. Menurut Richard Johson proses sebuah industri budaya sampai pada masyarakat konsumennya melalui komunikasi yang timpang, membentuk pola komunikasi siklik, saling terhubung namun penuh dengan keterpelesetan, saling mewarnai namun tidak menentukan secara pasti antara produsen industri budaya dengan masyarakat konsumennya. Penelitian ini ditempuh

  2. An introduction to heavy mesons

    CERN Document Server

    Grinstein, B

    1995-01-01

    Introductory lectures (delivered at the VI Mexican School of Particles and Fields) on heavy quarks and heavy quark effective field theory. Applications to inclusive semileptonic decays and to interactions with light mesons are covered in detail.

  3. Skyrmions with vector mesons revisited

    CERN Document Server

    Oh, Yongseok

    2014-01-01

    In order to develop a model that can describe both a single baryon and multi-baryon systems on the same footing, we re-investigate the Skyrme model in a chiral Lagrangian derived from the hidden local symmetry (HLS) up to $O(p^4)$ including the homogeneous Wess-Zumino terms. We use the master formulas that connect the parameters of the HLS Lagrangian and a class of holographic QCD models, which provides a controllable way to determine the low-energy constants of the Lagrangian once the pion decay constant and the vector meson mass are given. Therefore, this model allows us to study the role of vector mesons in the skyrmion structure. We find that the $\\rho$ and $\\omega$ vector mesons have different roles in the skyrmion structure and that the $\\omega$ meson has an important role in the properties of the nucleon.

  4. Sleeping Beauties in Meme Diffusion

    CERN Document Server

    Zhang, Leihan; Xu, Ke

    2016-01-01

    A sleeping beauty in diffusion indicates that the information, can be ideas or innovations, will experience a hibernation before a sudden spike of popularity and it is widely found in citation history of scientific publications. However, in this study, we demonstrate that the sleeping beauty is an universal phenomenon in information diffusion and even more inspiring, there exist two consecutive sleeping beauties in the entire lifetime of propagation, suggesting that the information, including trending topics, search queries or Wikipedia views, which we call memes, will go unnoticed for a period and suddenly attracts some attention, and then it falls asleep again and later wakes up with another unexpected popularity peak. Further explorations on this phenomenon show that intervals between two wake ups follow an exponential distribution and the second awakening stage generally reaches its peak at a higher velocity and will bring a wider dissemination. Taking these findings into consideration, the upgraded Bass ...

  5. Beauty and brains don't mix?

    OpenAIRE

    Fallesen, Krista Bjerknæs; Schultz, Astrid Andrea; Nielsen, Christine Strube; Hansen, Sandra Springborg

    2014-01-01

    This project revolves around beautiful people. There do not exist a recipe for having a beautiful appearance, but we are from childhood as individuals 'coded' to recognize what is beautiful. This project is based on the fact that beautiful people are assigned values that they do not necessarily possess. These values will be described through Pierre Bourdieu's theory about capital and habitus. Some values will be examined especially in relation to one's job situation. Today's labor market will...

  6. Two beautiful proofs of Pick's theorem

    OpenAIRE

    Raman Sundström, Manya; Öhman, Lars-Daniel

    2011-01-01

    We present two different proofs of Pick’s theorem and analyse in what ways might be perceived as beautiful by working mathematicians. In particular, we discuss two concepts, generality and specificity, that appear to contribute to beauty in different ways. We also discuss possible implications on insight into the nature of beauty in mathematics, and how the teaching of mathematics could be impacted, especially in countries in which discussions of beauty and aesthetics are notably absent from...

  7. The Staunch Beauty of Flowers

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    MANY women like to collect dried flowers. Unable to bear the sight of beautiful blossoms withering, they press them between the leaves of books. As time passes, the original fresh flowers turn into thin pale-colored specimens, but a careful viewer will notice that they have taken on a new grace—just like Ren Jie herself; though no longer young, she has managed to create beauty out of her later life. Ren Jie’s love of flowers dates back to her childhood, when she started to collect flower specimens. As she grew up, she learned how to paint; later, she

  8. All things bright and beautiful

    OpenAIRE

    Brown, Chloe

    2012-01-01

    'All Things Bright and Beautiful' was exhibited in 20/21 Visual Arts Centre, Scunthorpe, which is sited in a 'redundant' church. The fundamental question that the exhibition explored concerned the role of 'the animal' within contemporary art and within secular society, which in turn hoped to prompt reflections on our understanding of the place of 'the human' in the world and in nature. If there is no divine order, as posited by the hymn 'All Things Bright and Beautiful', where does this leave...

  9. Performance of Pain, Performance of Beauty

    Science.gov (United States)

    Thompson, James

    2006-01-01

    "Performance of pain, performance of beauty" explores performance projects in war zones using Elaine Scarry's definitions of "pain" and "beauty" as a starting point. The way in which pain constricts the body and the experience that beauty can take a person beyond the body become a contested framework for considering two examples of performance.…

  10. Rare beauty and charm decays with the CMS experiment

    Science.gov (United States)

    Chen, Kai-Feng

    2013-05-01

    Rare beauty meson decays Bs0 → µ+µ-, B0 → μ+μ-, and charm meson decays D0 → μ+μ- are searched in pp collisions at √s = 7 TeV. A data sample corresponding to an integrated luminosity of 5 fb-1 collected by the CMS experiment is used for the B → μ+μ- study, while the data sample used for D0 → μ+μ- search is 90 pb-1. The number of events observed after applying the full selection criteria is consistent with the expectations from the sum of background and standard model signal. The resulting upper limits on the branching fractions are ℬ(Bs0 → µ+µ-) < 7.7 × 10-9, ℬ(B0 µ+ µ-) < 1.8 × 10-9 at 95% confidence level, and ℬ(D0 → μ+μ-) < 5.4 × 10-7 at 90% confidence level.

  11. Cross sections for meson-meson nonresonant reactions

    CERN Document Server

    Li, Yu-Qi

    2007-01-01

    Meson-meson nonresonant reactions governed by the quark-interchange mechanism are studied in a potential that is derived from QCD. S-wave elastic phase shifts for I=2 \\pi\\pi and I=3/2 K \\pi scattering are obtained with wave functions determined by the central spin-independent term of the potential. The reactions include inelastic scatterings of two mesons in the ground-state pseudoscalar octet and the ground-state vector nonet. Cross sections for reactions involving pion, rho, K and K^* indicate that mesonic interactions in matter consisting of only K and K^* can be stronger than mesonic interactions in matter consisting of only pions and rhos and the reaction of I=3/2 \\pi K^* \\to \\rho K is most important among the endothermic nonresonant reactions. By the quark-interchange mechanism we can offer \\sqrt s-dependences of phi absorption cross sections in collisions with pion and rho and relevant average cross sections what are very small for the reaction of I=1 \\pi \\phi \\to K^* K^* and remarkably large for the r...

  12. Computers, pattern, chaos and beauty

    CERN Document Server

    Pickover, Clifford A

    1980-01-01

    Combining fractal theory with computer art, this book introduces a creative use of computers. It describes graphic methods for detecting patterns in complicated data and illustrates simple techniques for visualizing chaotic behavior. ""Beautiful."" - Martin Gardner, Scientific American. Over 275 illustrations, 29 in color.

  13. Beauty Products and the Consumer.

    Science.gov (United States)

    New York State Education Dept., Albany. Bureau of Secondary Curriculum Development.

    GRADES OR AGES: High school. SUBJECT MATTER: Consumer education especially as it concerns the consumer's desire for beauty. Included are considerations of cosmetics, health spas, reducing salons, wigs, and jewelry. ORGANIZATION AND PHYSICAL APPEARANCE: The guide is discursively organized through the topics listed above. The physical appearance of…

  14. Quantum Beauty: Real and Ideal

    International Nuclear Information System (INIS)

    Does the world embody beautiful ideas? Pythagoras and Plato intuited that it should; Newton and Maxwell demonstrated how it could. But modern physics, and especially the quantum physics at its foundation, answers with a much more resounding and definitive 'Yes' I'll bring in history and art, as well as science, to make the case.(author)

  15. Beautiful Science: Worth a Visit

    Science.gov (United States)

    Bingham, Frederick M.

    2013-01-01

    For those in the profession of teaching physics who reside in or plan to visit the Los Angeles area, I would highly recommend a trip to the Huntington Library in San Marino, specifically to a permanent exhibit entitled "Beautiful Science: Ideas that Changed the World" in the Dibner Hall of the History of Science. The exhibit contains original…

  16. Charm and beauty production in D*μ events at H1/HERA

    International Nuclear Information System (INIS)

    Charm and beauty photoproduction is investigated with the H1 detector at HERA using events with a reconstructed D* meson and a muon. Data taken during the years 1999-2000 and 2004-2006, corresponding to a total integrated luminosity of 320 pb-1, are analysed. The D* mesons with transverse momentum pt(D*)>1.5 GeV and pseudorapidity vertical stroke η(D*) vertical stroke *±→D(-)0πs±→(K-+π±)πs±. In addition, muons with momentum p(μ)>2 GeV and vertical stroke η(μ) vertical stroke * meson and the muon. The charm and beauty cross sections were measured in photoproduction, i.e. for photon virtualities Q22, and for inelasticities 0.05vis(ep→ec anti cX→eD*±μX)=314±33(stat)±101(syst)pb σvis(ep→eb anti bX→eD*±μX)=90±20(stat)±26(syst)pb. The measurements are compared to leading order QCD calculations supplemented with parton showers as predicted by the PYTHIA Monte Carlo event generator. A ratio data/theory of 1.2±0.1(stat)±0.4(syst) and of 1.3±0.3(stat)±0.4(syst) is obtained for charm and beauty, respectively. Differential cross sections for the variables describing the D*μ system like transverse momentum pt(D*μ), pseudorapidity η(D*μ), invariant mass M(D*μ) and inelasticity y(D*μ) are measured and compared to the PYTHIA and the CASCADE Monte Carlo event generators. The theoretical models describe the shape of the differential distributions. Transverse momentum studies of the D*μ pair indicate a sensitivity to differing implementations of QCD dynamics in the simulation programs. (orig.)

  17. Photon-meson transition form factors of light pseudoscalar mesons

    CERN Document Server

    Xiao, B W; Xiao, Bo-Wen; Ma, Bo-Qiang

    2005-01-01

    The photon-meson transition form factors of light pseudoscalar mesons $\\pi ^{0}$, $\\eta $, and $\\eta ^{\\prime}$ are systematically calculated in a light-cone framework, which is applicable as a light-cone quark model at low $Q^{2}$ and is also physically in accordance with the light-cone pQCD approach at large $Q^{2}$. The calculated results agree with the available experimental data at high energy scale. We also predict the low $Q^{2}$ behaviors of the photon-meson transition form factors of $\\pi ^{0}$, $\\eta $ and $\\eta ^{\\prime }$, which are measurable in $e+A({Nucleus})\\to e+A+M$ process via Primakoff effect at JLab and DESY.

  18. Production of exotic and conventional quarkonia and open beauty/open charm at ATLAS

    CERN Document Server

    C. Bini; The ATLAS collaboration

    2016-01-01

    The ATLAS experiment at LHC is carrying on a wide programme to study the production properties of conventional and exotic quarkonium, beauty, and charm bound states. The latest results on J/$\\psi$, $\\psi$(2s) and X(3872) production at 7, 8, and 13 TeV, together with D meson production with Run-1 are presented. Studies of associated production of charmonium with vector bosons, searches for exotic states in the bottomonium sector and a new measurement of the ratio of b-quark fragmentation functions are also briefly presented.

  19. SuperB: An opportunity to study baryons with beauty and bottom super-nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Feliciello, A., E-mail: Alessandro.Feliciello@to.infn.it [Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)

    2012-05-01

    SuperB is an INFN flagship project for a new high-luminosity heavy-flavor factory. Along with its companion detector, it is dedicated to the search for CP violation effects in the B meson sector with the aim of looking for direct and indirect signals of new physics, beyond the Standard Model. However it could offer as well the opportunity for a systematic, high-statistics study of b baryon properties and for a search for bottom super-nuclei, that is bound nuclear systems with an explicit content of beauty.

  20. Non multa, sed multum: Future lessons from two-prong, two-body decays of beauty

    International Nuclear Information System (INIS)

    There are four two-body, two-prong decays modes of B mesons and two for beauty baryons and they are quite rare, i.e., their branching ratios are not expected to exceed the script O(10-4) level. Yet a detailed study of their relative rates with a sensitivity level of 10-5 can yield unique and important information on strong interactions. If the evolution of these reactions in proper time can be traced then, under favorable conditions, one can analyze B0 - anti B0 mixing and CP invariance in a detailed way. 4 refs

  1. Twenty Beautiful Years of Bottom Physics: proceedings of the b20 Symposium. Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Burnstein, R.A.; Kaplan, D.M.; Rubin, H.A. [Illinois Institute of Technology, Illinois (United States)

    1998-03-01

    The proceedings are based on papers presented at the Twenty Beautiful Years of Bottom Physics Symposium held in June, 1997 in Chicago. It marked the Twentieth Anniversary of the 1977 discovery of the b quark. The papers included in these proceedings present a snapshot of the current state of b physics. The topics covered are too numerous to list, briefly, they included experiments at electron{minus}positron colliders, hadronic production of heavy quark, quarkonium, B mesons, QCD of heavy quarks, physics at LEP and SLD, and the future hadroproduction experiments. There were 35 papers and out of these, 18 have been abstracted for the Energy Science and Technology database.(AIP)

  2. Meson Strings and Flavor Branes

    CERN Document Server

    Bando, M; Terunuma, S; Bando, Masako; Sugamoto, Akio; Terunuma, Sachiko

    2006-01-01

    In a QCD-like string model based on D6 flavor branes in the presence of D4 color branes wrapping one of the compactified dimension on an $S^1$, the shape of meson strings in the five dimensional curved space as well as the potential between quark and anti-quark are investigated. The flavor branes on which both ends of a meson string live are assumed to be separated in this five dimensional space, depending on the values of the constituent quark masses. It is shown in this picture that the meson string with different flavors on both ends changes its shape at a critical distance. There is, however, no critical distance for the meson with the same flavors. At this critical distance the potential between quark and anti-quark with different flavors gives a point of reflection and changes its shape around this point. Accordingly, the attractive force between quark and anti-quark seems to become stronger when the distance of flavor branes connecting meson strings becomes larger. This indicates quark systems with dif...

  3. Hard Exclusive Production of Tensor Mesons

    CERN Document Server

    Braun, V M

    2001-01-01

    We point out that hard exclusive production of tensor mesons $f_2(1270)$ with helicity $\\lambda=\\pm 2$ is dominated by the gluon component in the meson wave function and can be used to determine gluon admixture in tensor mesons in a theoretically clean manner. We present a detailed analysis of the tensor meson distribution amplitudes and calculate the transition form factor $\\gamma+\\gamma^*\\to f_2(1270)$ for one real and one virtual photon.

  4. Neutral B meson flavor tagging

    CERN Document Server

    Wilson, R J

    2001-01-01

    We present an investigation of the use of net charge and kaon identification to tag the flavor of neutral B mesons. The net charge of the neutral B meson decay products is zero if all charged particles are used and slightly non-zero if only undiscriminated hadronic final states are used. The net charge of the kaons alone correctly tags the identity of the neutral meson in at least a third of all decays. We have parametrized the particle identification capability of several techniques, such as dE/dx in time projection chambers, LEP/SLC ring-imaging chambers and an enhanced BaBar DIRC. Using these parametrisations we compare the relative tagging power of each technique to that of an ideal detector. (8 refs).

  5. Revealing the Beauty behind the Sleeping Beauty Problem

    OpenAIRE

    Mariolis, Ioannis

    2014-01-01

    A large number of essays address the Sleeping Beauty problem, which undermines the validity of Bayesian inference and Bas Van Fraassen's 'Reflection Principle'. In this study a straightforward analysis of the problem based on probability theory is presented. The key difference from previous works is that apart from the random experiment imposed by the problem's description, a different one is also considered, in order to negate the confusion on the involved conditional probabilities. The resu...

  6. Heavy meson production in hot dense matter

    NARCIS (Netherlands)

    Tolos, Laura; Gamermann, Daniel; Garcia-Recio, Carmen; Molina, Raquel; Nieves, Juan; Oset, Eulogio; Ramos, Angels; Nieves, JM; Oset, E; Vacas, MJV

    2010-01-01

    The properties of charmed mesons in dense matter are studied using a unitary coupled-channel approach in the nuclear medium which takes into account Pauli-blocking effects and meson self-energies in a self-consistent manner. We obtain the open-charm meson spectral functions in this dense nuclear env

  7. Exlusive charmed meson pair production

    CERN Document Server

    Berezhnoy, A V

    2004-01-01

    The experimental data of BELLE Collaboration on the exclusive charmed meson pair production in the process of monophotonic $e^+e^-$-annihilation ($e^+e^-\\to \\gamma^* \\to D\\bar D$) has been studied. It has been shown that these data is described satisfactorily in the frame work of constituent quark model. Our studies have demonstrated that the central production process $e^+e^-\\to e^+e^-\\gamma\\gamma \\to e^+e^-D\\bar D +X$ and the process of monophotonic $e^+e^-$-annihilation yield comparable numbers of the charmed meson pairs.

  8. Measurements of observables in the pion-nucleon system, nuclear a- dependence of heavy quark production and rare decays of D and B mesons. Progress report, 1 December, 1990--15 February, 1992

    Energy Technology Data Exchange (ETDEWEB)

    Sadler, M.E.; Isenhower, L.D.

    1992-02-15

    This report discusses research on the following topics: pion-nucleon interactions; detector tomography facility; nuclear dependence of charm and beauty quark production and a study of two-prong decays of neutral D and B mesons; N* collaboration at CEBAF; and pilac experiments. (LSP)

  9. Determination of the X(3872) meson quantum numbers

    Science.gov (United States)

    Gui, Bin

    The Large Hadron Collider beauty (LHCb) is one of the several experiments located at the ring of the Large Hadron Collider (LHC) in Geneva. The LHCb detector is a single arm forward spectrometer and is designed to perform high precision measurements of Charge Parity (CP) violation parameters and rare decays of the beauty and charm hadrons. The detector was successfully operated at a center-of-mass energy of 7 TeV in 2010 and 2011 and at 8 TeV in 2012. Over 3 fb-1 of data has been collected by the LHCb. The LHCb experiment is also well suited for studies on hadron spectroscopy. Besides the well established mesons consisting of quark-antiquark pairs (qq), it has been proposed that "exotic" qqqq mesons could exist. One of the candidates for a four-quark state is the charmonium-like state X(3872) which was first observed by the Belle experiment in 2003. This narrow state has a mass of about 3872 MeV which is located in a region of excited charmonium states (cc). However its mass does not match to any theoretically predicted charmonium state. In order to investigate the nature of this anomalous state, we analyze its quantum number which is the key for its interpretation. The X(3872) events are reconstructed from B+ → X(3872)K+, where X(3872) → pi + pi J/psi, J/psi → mu+mu -; based on 1 fb-1 of 2011 data collected by LHCb detector. We implement a method which is guaranteed by statistics to be the most powerful way to discriminate between spin hypotheses; namely unbinned likelihood ratio test using full angular phase-space. The 5-dimensional analysis shows that 1++ hypothesis is preferred with overwhelming significance. The only alternative assignment allowed by the previous measurements, JPC = 2 -+, is rejected with a confidence level equivalent to more than eight Gaussian standard deviations. This result favors exotic explanations of the X(3872) state, such as a mesonic molecule or a tetraquark.

  10. Hadrons with Charm and Beauty

    OpenAIRE

    Bagan, E.; Dosch, H. G.; Gosdzinsky, P.; Narison, S.; Richard, J. M.

    1994-01-01

    By combining potential models and QCD spectral sum rules (QSSR), we discuss the spectroscopy of the $(b\\bar c)$ mesons and of the $(bcq)$, $(ccq)$ and $(bbq)$ baryons (${q}\\equiv {d}$ or $s$), the decay constant and the (semi)leptonic decay modes of the $B_c$ meson. For the masses, the best predictions come from potential models and read: $M_{B_c} = (6255 \\pm 20)$~MeV, $M_{B^*_c} = (6330 \\pm 20)$~MeV, $M_{\\Lambda(bcu)} = (6.93\\pm 0.05)$~GeV, $M_{\\Omega(bcs)} = (7.00\\pm 0.05)$~GeV, $M_{\\Xi^*(c...

  11. What is the beauty standard?

    Institute of Scientific and Technical Information of China (English)

    谢华山

    2005-01-01

    最近,你校学生会组织学生开展了一场讨论,主题是:What is the beauty standard?假若你是学生会主席,请根据下表学生讨论的结果写份总结材料并谈谈对以上观点的看法。

  12. Facial beauty and fractal geometry

    OpenAIRE

    Schmidhuber, Juergen

    1998-01-01

    What is it that makes a face beautiful? Average faces obtained by photographic (Galton 1878) or digital (Langlois & Roggman 1990) blending are judged attractive but not optimally attractive (Alley & Cunningham 1991) --- digital exaggerations of deviations from average face blends can lead to higher attractiveness ratings (Perrett, May, & Yoshikawa 1994). My novel approach to face design does not involve blending at all. Instead, the image of a female face with high ratings is composed from a ...

  13. Unraveling the pattern of the $XYZ$ mesons

    CERN Document Server

    Vijande, J

    2015-01-01

    We present a plausible mechanism for the origin of the $XYZ$ mesons in the heavy meson spectra within a standard quark-model picture. We discuss the conditions required for the existence of four--quark bound states or resonances contributing to the heavy meson spectra, being either compact or molecular. We concentrate on charmonium and bottomonium spectra, where several new states, difficult to understand as simple quark-antiquark pairs, have been reported by different experimental collaborations. The pivotal role played by entangled meson-meson thresholds is emphasized.

  14. Performing Beauty in Participatory Art and Culture

    DEFF Research Database (Denmark)

    Heinrich, Falk

    This book investigates the notion of beauty in participatory art, an interdisciplinary form that necessitates the audience’s agential participation and that is often seen in interactive art and technology-driven media installations. After considering established theories of beauty, for example......, Plato, Alison, Hume, Kant, Gadamer and Santayana through to McMahon and Sartwell, Heinrich argues that the experience of beauty in participatory art demands a revised notion of beauty; a conception that accounts for the performative and ludic turn within various art forms and which is, in a broader...... sense, a notion of beauty suited to a participatory and technology-saturated culture. Through case studies of participatory art, he provides an art-theoretical approach to the concept of performative beauty; an approach that is then applied to the wider context of media and design artefacts....

  15. Exclusive meson production at NLO

    Energy Technology Data Exchange (ETDEWEB)

    Diehl, M.; Kugler, W.

    2007-06-15

    We report on numerical studies of the NLO corrections to exclusive meson electroproduction, both in collider and fixed-target kinematics. Corrections are found to be huge at small x{sub B} and moderate at intermediate or large x{sub B}. (orig.)

  16. Holographic mesons in various dimensions

    CERN Document Server

    Myers, R C; Myers, Robert C.; Thomson, Rowan M.

    2006-01-01

    We calculate the spectrum of fluctuations of a probe Dk-brane in the background of N Dp-branes, for k=p,p+2,p+4 and p< 5. The result corresponds to the mesonic spectrum of a (p+1)-dimensional super-Yang-Mills (SYM) theory coupled to `dynamical quarks', i.e., fields in the fundamental representation -- the latter are confined to a defect for k=p and p+2. We find a universal behaviour where the spectrum is discrete and the mesons are deeply bound. The mass gap and spectrum are set by the scale M ~ m_q/g_{eff}(m_q), where m_q is the mass of the fundamental fields and g_{eff}(m_q) is the effective coupling evaluated at the quark mass, i.e. g_{eff}^2(m_q)=\\gym^2N m_q^{p-3}. We consider the evolution of the meson spectra into the far infrared of three-dimensional SYM, where the gravity dual lifts to M-theory. We also argue that the mass scale appearing in the meson spectra is dictated by holography.

  17. Exclusive meson production at COMPASS

    CERN Document Server

    Pochodzalla, J; Moinester, M A; Piller, G; Sandacz, A; Vanderhaeghen, M; Pochodzalla, Josef; Mankiewicz, Lech; Moinester, Murray; Piller, Gunther; Sandacz, Andrzej; Vanderhaeghen, Marc

    1999-01-01

    We explore the feasibility to study exclusive meson production (EMP) in hard muon-proton scattering at the COMPASS experiment. These measurements constrain the off-forward parton distributions (OFPD's) of the proton, which are related to the quark orbital contribution to the proton spin.

  18. Pseudoscalar meson form factors and decays

    CERN Document Server

    Dorokhov, A E

    2011-01-01

    In this communication we discuss few topics related with modern experimental data on the physics of light pseudoscalar mesons. It includes the contribution of the pseudoscalar mesons to the muon anomalous magnetic moment (AMM), $g-2$, the rare decays of light pseudoscalar mesons to lepton pair, the transition form factors of pseudoscalar mesons at large momentum transfer, the pion transversity form factor. Measuring the muon anomalous magnetic moment $g-2$ and the rare decays of light pseudoscalar mesons into lepton pair $P\\rightarrow l^{+}l^{-} $ serve as important test of the standard model. To reduce the theoretical uncertainty in the standard model predictions the data on the transition form factors of light pseudoscalar mesons play significant role. Recently new data on behavior of these form factors at large momentum transfer was supplied by the BABAR collaboration. Within the nonlocal chiral quark model it shown how to describe these data and how the meson distribution amplitude evolves as a function o...

  19. Vector meson electroproduction in QCD

    Institute of Scientific and Technical Information of China (English)

    LU Juan; CAI Xian-Hao; ZHOU Li-Juan

    2012-01-01

    Based on the generalized QCD vector meson dominance model,we study the electroproduction of a vector meson off a proton in the QCD inspired eikonalized model.Numerical calculations for the total cross section σtot and differential cross section dσ/dt are performed for p,ω and φ meson electroproduction in this paper.Since gluons interact among themselves (self-interaction),two gluons can form a glueball with quantum numbers IG,JPC =0+,2++,decay width Γt ≈ 100 MeV,and mass of mG=2.23 GeV.The three gluons can form a three-gluon colorless bound state with charge conjugation quantum number C =-1,called the Odderon.The mediators of interactions between projectiles (the quark and antiquark pair fluctuated from the virtual photon) and the proton target (a three-quark system) are the tensor glueball and the Odderon.Our calculated results in the tensor glueball and Odderon exchange model fit to the existing data successfully,which evidently shows that our present QCD mechanism is a good description of meson electroproduction off a proton.It should be emphasized that our mechanism is different from the theoretical framework of Block et al.We also believe that the present study and its success are important for the investigation of other vector meson electro- and photoproduction at high energies,as well as for searching for new particles such as tensor glueballs and Odderons,which have been predicted by QCD and the color glass condensate model (CGC).Therefore,in return,it can test the validity of QCD and the CGC model.

  20. Flavor SU(3 properties of beauty tetraquark states with three different light quarks

    Directory of Open Access Journals (Sweden)

    Xiao-Gang He

    2016-10-01

    Full Text Available Beauty tetraquark states X(b¯q′q″q¯ composed of b¯sud¯, b¯dsu¯, and b¯uds¯, are unique that all the four valence quarks are different. Although the claim of existence of the first two states by D0 was not confirmed by data from LHCb, the possibility of such states still generated a lot of interests and should be pursued further. Non-observation of X(b¯q′q″q¯ states by LHCb may be just due to a still lower production rate than the limit of LHCb or at some different mass ranges. In this work we use light quark SU(3 flavor symmetry as guideline to classify symmetry properties of beauty tetraquark states. The multiplets which contain states with three different light quarks must be one of 6¯ or 15 of SU(3 representations. We study possible decays of such a tetraquark state into a B meson and a light pseudoscalar octet meson by constructing a leading order chiral Lagrangian, and also provide search strategies to determine whether a given tetraquark state of this type belongs to 6¯ or 15. If X(b¯q′q″q¯ belongs to 15, there are new doubly charged tetraquark states b¯uud¯ and b¯uus¯.

  1. Flavor SU(3) properties of beauty tetraquark states with three different light quarks

    Science.gov (United States)

    He, Xiao-Gang; Ko, Pyungwon

    2016-10-01

    Beauty tetraquark states X (b bar q‧q″ q bar) composed of b bar su d bar , b bar ds u bar , and b bar ud s bar , are unique that all the four valence quarks are different. Although the claim of existence of the first two states by D0 was not confirmed by data from LHCb, the possibility of such states still generated a lot of interests and should be pursued further. Non-observation of X (b bar q‧q″ q bar) states by LHCb may be just due to a still lower production rate than the limit of LHCb or at some different mass ranges. In this work we use light quark SU (3) flavor symmetry as guideline to classify symmetry properties of beauty tetraquark states. The multiplets which contain states with three different light quarks must be one of 6 bar or 15 of SU (3) representations. We study possible decays of such a tetraquark state into a B meson and a light pseudoscalar octet meson by constructing a leading order chiral Lagrangian, and also provide search strategies to determine whether a given tetraquark state of this type belongs to 6 bar or 15. If X (b bar q‧q″ q bar) belongs to 15, there are new doubly charged tetraquark states b bar uu d bar and b bar uu s bar .

  2. Beauty and critical art: is beauty at odds with critical–political engagement?

    Directory of Open Access Journals (Sweden)

    Maria-Alina Asavei

    2015-06-01

    Full Text Available Traditionally, beauty is understood as an ability of some objects (artworks included to occasion in viewers a distinctive type of unmediated/pure pleasure—aesthetic pleasure. According to this common understanding of beauty, political–critical art does not seem to raise in viewers the feeling of aesthetic pleasure. Many contemporary critical artists and politically engaged artists deliberately produce an art as unappealing to the senses as possible (their attitude could be called, following Arthur Danto, kalliphobia—“beauty phobia”. Critical art is a type of art which usually does not strike us with beauty at first sight because this “political art” usually deals with issues of social injustice and political struggles, rendering contemplation and aesthetic pure pleasure unachievable. Yet, even if beauty, in critical art's case, seems to be a difficult, demanding, and not an immediately recognisable one (mostly because of its unappealing, unsettling look, this does not mean that it lacks or is at odds with critical engagement (as some critical artists and theorists have argued. The argument of this paper is that not every beautiful thing looks good at first sight. By the same token, not everything that looks beautiful is in fact beautiful. Drawing on Immanuel Kant's neglected pulchritude adhaerens (dependent beauty, I argue that political–critical art is characterised by a dependent type of beauty (beauty a thing has as a thing of a certain kind and with a certain function as opposed to free beauty (as something we like it freely on its own account, independent of what it is and what it does. Political–critical art can claim a dependent beauty (an impure, “difficult” and not straightforward pleasurable type of beauty without being compelled to submit itself, at the same time, to the free beauty.

  3. On Deusons or Deuteronlike Meson-Meson Bound States

    CERN Document Server

    Törnqvist, N A

    1994-01-01

    The systematics of deuteronlike two-meson bound states, {\\it deusons}, is discussed. Previous arguments that many of the present non-$q\\bar q$ states are such states are elaborated including, in particular, the tensor potential. For pseudoscalar states the important observation is made that the centrifugal barrier from the P-wave can be overcome by the $1/r^2$ and $1/r^3$ terms of the tensor potential. In the heavy meson sector one-pion exchange alone is strong enough to form at least deuteron-like $B\\bar B^*$ and $B^*\\bar B^*$ composites bound by approximately 50 MeV, while $D\\bar D^*$ and $D^*\\bar D^*$ states are expected near the threshold.

  4. Charm and beauty production in D{sup *}{mu} events at H1/HERA

    Energy Technology Data Exchange (ETDEWEB)

    Lucaci-Timoce, A.I.

    2007-07-15

    Charm and beauty photoproduction is investigated with the H1 detector at HERA using events with a reconstructed D{sup *} meson and a muon. Data taken during the years 1999-2000 and 2004-2006, corresponding to a total integrated luminosity of 320 pb{sup -1}, are analysed. The D{sup *} mesons with transverse momentum p{sub t}(D{sup *})>1.5 GeV and pseudorapidity vertical stroke {eta}(D{sup *}) vertical stroke <1.5 are reconstructed via the decay channel D{sup *{+-}}{yields}D{sup (-)0}{pi}{sub s}{sup {+-}}{yields}(K{sup -+}{pi}{sup {+-}}){pi}{sub s}{sup {+-}}. In addition, muons with momentum p({mu})>2 GeV and vertical stroke {eta}({mu}) vertical stroke <1.735 are selected. With this selection, the contribution of light quark initiated events is negligible. The fractions of charm and beauty events in data are extracted exploiting the charge and azimuthal angle correlation between the D{sup *} meson and the muon. The charm and beauty cross sections were measured in photoproduction, i.e. for photon virtualities Q{sup 2}<1 GeV{sup 2}, and for inelasticities 0.05beauty, respectively. Differential cross sections for the variables describing the D{sup *}{mu} system like transverse momentum p{sub t}(D{sup *}{mu}), pseudorapidity {eta}(D{sup *}{mu}), invariant mass M(D{sup *}{mu}) and inelasticity y(D{sup *}{mu}) are measured and compared to the PYTHIA and the CASCADE Monte Carlo event generators. The theoretical models describe the shape of the differential distributions. Transverse momentum studies of the D

  5. My Beautiful Relationship with China

    Institute of Scientific and Technical Information of China (English)

    Gian; Franco; Terenzi

    2014-01-01

    <正>The beautiful story of friendship began in 1987 when I served as Captain Regent(Head of State)of San Marino.Back then,I had some knowledge of China and decided to realize my dream of paying an offi cial visit there during my tenure.It was my first trip,so I did not know what was awaiting me.However,I was sure it would be something positive.At the head of a delegation,I arrived in China in February 1988.The reception was meticulous and incom-

  6. Markkinointisuunnitelma RVB Beauty Clinic Kotka

    OpenAIRE

    Piipponen, Tiia

    2012-01-01

    Työn tarkoituksena oli tehdä markkinointisuunnitelma RVB Beauty Clinic Kotkalle. Tavoitteena oli selvittää yrityksen nykytilanne käytössä olevien tietolähteiden avulla ja luoda näiden perusteella selkeitä linjauksia yrityksen markkinointiin. Markkinointisuunnitelmaa lähdin luomaan asiakassuhdemarkkinoinnin näkökulmasta, koska kyseessä on yritys, jossa työskentelee vain yksi henkilö. Lähtötilanteen selvityksessä käytin yrittäjän ja maahantuojan haastatteluja, kilpailijoiden kotisivuja ja e...

  7. Beautiful Mirrors at the LHC

    OpenAIRE

    Kumar, Kunal; Shepherd, William; Tait, Tim M. P.; Vega-Morales, Roberto(Laboratoire de Physique Théorique, CNRS-UMR 8627, Université Paris-Sud 11, F-91405, Orsay Cedex, France)

    2010-01-01

    We explore the "Beautiful Mirrors" model, which aims to explain the measured value of $A^b_{FB}$, discrepant at the $2.9\\sigma$ level. This scenario introduces vector-like quarks which mix with the bottom, subtly affecting its coupling to the $Z$. The spectrum of the new particles consists of two bottom-like quarks and a charge -4/3 quark, all of which have electroweak interactions with the third generation. We explore the phenomenology and discovery reach for these new particles at the LHC, ...

  8. A Beautiful Proof by Induction

    OpenAIRE

    Öhman, Lars-Daniel

    2016-01-01

    The purpose of this note is to present an example of a proof by induction that in the opinion of the present author has great aesthetic value. The proof in question is Thomassen’s proof that planar graphs are 5-choosable. I give a self-contained presentation of this result and its proof, and a personal account of why I think this proof is beautiful. A secondary purpose is to more widely publicize this gem, and hopefully make it part of a standard set of examples for examining characteristics ...

  9. Perceiving beauty in all women: Psychometric evaluation of the Broad Conceptualization of Beauty Scale.

    Science.gov (United States)

    Tylka, Tracy L; Iannantuono, Amy C

    2016-06-01

    Women's ability to broadly conceptualize beauty (i.e., perceive many looks, appearances, body sizes/shapes, and inner characteristics as beautiful) has been identified as a facet of positive body image in qualitative research. A scale is needed to be able to assess this construct within quantitative research. Therefore, we developed the Broad Conceptualization of Beauty Scale (BCBS), which measures the extent women define female beauty widely within external and internal characteristics, and examined its psychometric properties among four community samples totaling 1086 women. Exploratory and confirmatory factor analyses revealed a unidimensional structure with nine items. The internal consistency, test-retest reliability, and construct (convergent, discriminant, and incremental) validity of its scores were upheld. Researchers and clinicians can use the BCBS alone to assess women's perceptions of female beauty, or they can use the BCBS alongside women's perceptions of self-beauty to more comprehensively explore women's ability to broadly conceptualize beauty for others and themselves.

  10. Perceiving beauty in all women: Psychometric evaluation of the Broad Conceptualization of Beauty Scale.

    Science.gov (United States)

    Tylka, Tracy L; Iannantuono, Amy C

    2016-06-01

    Women's ability to broadly conceptualize beauty (i.e., perceive many looks, appearances, body sizes/shapes, and inner characteristics as beautiful) has been identified as a facet of positive body image in qualitative research. A scale is needed to be able to assess this construct within quantitative research. Therefore, we developed the Broad Conceptualization of Beauty Scale (BCBS), which measures the extent women define female beauty widely within external and internal characteristics, and examined its psychometric properties among four community samples totaling 1086 women. Exploratory and confirmatory factor analyses revealed a unidimensional structure with nine items. The internal consistency, test-retest reliability, and construct (convergent, discriminant, and incremental) validity of its scores were upheld. Researchers and clinicians can use the BCBS alone to assess women's perceptions of female beauty, or they can use the BCBS alongside women's perceptions of self-beauty to more comprehensively explore women's ability to broadly conceptualize beauty for others and themselves. PMID:26971117

  11. Beautiful Baryons from Lattice QCD

    OpenAIRE

    Alexandrou, C.; Borrelli, A; Güsken, S.; Jegerlehner, F.; K. Schilling; Siegert, G.; Sommer, R

    1994-01-01

    We perform a lattice study of heavy baryons, containing one ($\\Lambda_b$) or two $b$-quarks ($\\Xi_b$). Using the quenched approximation we obtain for the mass of $\\Lambda_b$ $$ M_{\\Lambda_b}= 5.728 \\pm 0.144 \\pm 0.018 {\\rm GeV}.$$ The mass splitting between the $\\Lambda_b$ and the B-meson is found to increase by about 20\\% if the light quark mass is varied from the chiral limit to the strange quark mass.

  12. Free Harmonious Beauty of Greek Sculpture

    Institute of Scientific and Technical Information of China (English)

    郑晓杨

    2015-01-01

    Greek art in the content and form of the art of the beautiful, harmonious effect fully expresses the interpretation of the height of the spirit of freedom, and the Greek sculpture is a powerful representative of Greek art. In this paper, from a few large sculpture art to savor the Greek sculpture artistic freedom and harmonious beauty.

  13. Is Beauty an Archaic Spirit in Education?

    Science.gov (United States)

    Cannatella, Howard

    2006-01-01

    This article discusses the unfashionable and taboo idea that beauty matters. The author's supposition is that beauty as a poetic force should be regarded as one of the defining characteristics central to pedagogic practice. In making this claim he draws upon a few of Charles Dickens' and William Wordsworth's ideas in support of the importance of…

  14. ATTRACTION OF STUDENTS TOWARDS BEAUTY PRODUCTS

    Directory of Open Access Journals (Sweden)

    Fouzia Ali

    2011-07-01

    Full Text Available The purpose of this study was to measure the correlation and impact of deceptive beauty advertising (Ads with and on the buying behavior of the university students toward beauty products. Developed instrument contained nineteen questions. Five point Likert scale was used and the response rate was 94.667%. Two variables were computed; buying behavior of university students towards beauty products was dependent variable; and deceptive beauty ads were independent variable. Descriptive statistics, correlation and liner regression techniques were used with the help of SPSS 16. Positive and significant correlation and impact was found with and on the buying behavior of university students toward beauty products which means that the use of beauty products increases with the increase in deception in beauty products ads. The data were collected from university students and non-serious attitude of students were the limitations of this study. In this study, the main focus was on the buying behavior of students and beauty products ads, and it will serve as a benchmark for prospective researchers for future study.

  15. Beautiful Exit: Break Up With A Smile

    OpenAIRE

    Alajoutsijärvi, K; MÖller, K.; Tähtinen, J. (Jaana)

    1999-01-01

    This paper constructs a framework describing communication strategies available in dissolving interorganisational buyer-seller relationships. In particular, we bring in a quality aspect, as we are looking for strategies that could be labelled "beautiful exits". A beautiful exit is achieved by using a communication strategy that minimises damages occurring to the disengager, the other party and the connected network.

  16. Charm and beauty physics at Fermilab

    International Nuclear Information System (INIS)

    The status of charm and beauty physics studies at Fermilab is reviewed. Data from fixed target experiments on charm production, semi-leptonic decay, and Cabibbo suppressed decays as well as charmonium studies in antiproton annihilation are described. In addition beauty results from CDF and E653 are reviewed and prospects for studies of B physics at collider detectors are discussed

  17. Strange Baryon to Meson Ratio

    CERN Document Server

    Cuautle, Eleazar

    2013-01-01

    We present a model to compute baryon and meson transverse momentum distributions, and their ratios, in relativistic heavy-ion collisions. The model allows to compute the probability to form colorless bound states of either two or three quarks as functions of the evolving density during the collision. The qualitative differences of the baryon to meson ratio for different collision energies and for different particle species can be associated to the different density dependent probabilities and to the combinatorial factors which in turn depend on whether the quarks forming the bound states are heavy or light. We compare to experimental data and show that we obtain a good description up to intermediate values of $pt$.

  18. Resurrection of the $\\sigma$ meson

    CERN Document Server

    Törnqvist, N A; Tornqvist, Nils A; Roos, Matts

    1995-01-01

    It is shown from a very general model and an analysis of data on the lightest 0++ meson nonet that the f0(980) and f0(1200) resonance poles are two manifestations of the same ss state. Similarily the a0(980) and the a0(1450) are likely to be two manifestations of the same qq state. On the other hand, the uu+dd state, when unitarized and strongly distorted by hadronic mass shifts, becomes an extremely broad Breit-Wigner-like background, m=860 MeV, Gamma=880 MeV, with its pole at s=(0.158-i0.235) GeV^2. This we identify with the sigma meson required by models for spontaneous breaking of chiral symmetry.

  19. Primakoff production of hybrid mesons

    International Nuclear Information System (INIS)

    The viability of Primakoff technique in searching for hybrid states, and exotic JPC = 1-+ isovector meson bar ρ in particular, is discussed. Results of searches for Primakoff production of an bar ρ in ρπ and ηπ final states produced in high energy interactions of pions with large-Z nuclei are reviewed, and the limits for the radiative coupling Γ( bar ρ+ → π+γ) are presented. Based on available experimental information, electromagnetic production rate estimates are given for the favored bar ρ → πf1(1285) channel. It is argued that a dedicated Primakoff production experiment can be sensitive to values of Γ( bar ρ+ → π+γ) ∼ keV, which makes such measurement a very interesting option for doing spectroscopy of gluonic (and conventional) meson states in the 1.5 ∼ 3 GeV mass range. 18 references, 2 figures

  20. Measurement of Charm Meson Lifetimes

    International Nuclear Information System (INIS)

    We report measurements of the D0 , D+ , and D+s meson lifetimes using 3.7 fb-1 of e+e- annihilation data collected near the Υ(4S) resonance with the CLEO detector. The measured lifetimes of the D0 , D+ , and D+s mesons are 408.5±4.1+3.5-3.4 fs , 1033.6±22.1+9.9-12.7 fs , and 486.3±15.0+4.9-5.1 fs . The precision of these lifetimes are comparable to those of the best previous measurements, and the systematic errors are very different. In a single experiment we find that the ratio of the D+s and D0 lifetimes is 1.19±0.04 . copyright 1999 The American Physical Society

  1. Properties of the D mesons

    International Nuclear Information System (INIS)

    A review is given of the nonleptonic decays of D mesons. Included are measurements of the psi(3772), the accurate determination of D masses and their consequences, and inclusive measurements and tagged events. It is noted that the distinction between the above designated events is that in the former one detects a D decay and ignores the remainder of the event, while in the tagged events a D decay is detected and also the remainder of the event is studied. 39 references

  2. Exclusive meson production at HERMES

    CERN Document Server

    Manaenkov, Sergey

    2016-01-01

    The data were accumulated with the HERMES forward spectrometer using the 27.6 GeV longitudinally polarized electron or positron beam of HERA. Exclusive electroproduction of $\\omega$ mesons on unpolarized hydrogen and deuterium targets is studied in the kinematic region of $Q^2>1.0$ GeV$^2$, 3.0 GeV $< W <$ 6.3 GeV, and $-t'< 0.2 $ GeV$^{2}$, while for $\\rho^0$-meson production on a transversely polarized hydrogen target $-t'< 0.4$ GeV$^{2}$ is used. Spin-density matrix elements for $\\omega$ production are presented in projections of $Q^2$ or $-t'$, while the ratios of the helicity amplitudes for the reaction $\\gamma^*+p \\to \\rho^0+p$ are obtained in the entire kinematic region. The usage of the transversely polarized target allows for the first time the extraction of the ratios of certain nucleon-helicity-flip amplitudes to the natural-parity exchange amplitude $T_{0\\frac{1}{2}0\\frac{1}{2}}$ without the nucleon-helicity flip describing the longitudinal $\\rho^0$-meson production by the longitudinal...

  3. Dynamical meson melting in holography

    International Nuclear Information System (INIS)

    We discuss mesons in thermalizing gluon backgrounds in the N=2 supersymmetric QCD using the gravity dual. We numerically compute the dynamics of a probe D7-brane in the Vaidya-AdS geometry that corresponds to a D3-brane background thermalizing from zero to finite temperatures by energy injection. In static backgrounds, it has been known that there are two kinds of brane embeddings where the brane intersects the black hole or not. They correspond to the phases with melted or stable mesons. In our dynamical setup, we obtain three cases depending on final temperatures and injection time scales. The brane stays outside of the black hole horizon when the final temperature is low, while it intersects the horizon and settles down to the static equilibrium state when the final temperature is high. Between these two cases, we find the overeager case where the brane dynamically intersects the horizon although the final temperature is not high enough for a static brane to intersect the horizon. The interpretation of this phenomenon in the dual field theory is meson melting due to non-thermal effects caused by rapid energy injection. In addition, we comment on the late time evolution of the brane and a possibility of its reconnection

  4. B meson proper time measurements with the LHCb experiment impact on physics parameters and calibration methods

    CERN Document Server

    Balbi, G

    2007-01-01

    The LHCb (Large Hadron Collider beauty) experiment is one of the four experiments at the LHC, and is specifically dedicated to explore the B-meson dynamics. To this end, LHCb will exploit the large beauty production cross section, expected to be about 500 µb at 14 TeV p-p collisions. Differently from the B-factory case, the hadronization of the b-quarks at LHC will generate all the possible B-hadrons, remarkably the Bs and Bc mesons, where the present experimental knowledge is still rather poor. The number of b/b_bar pairs produced at the LHCb interaction point will be of the order of 10^12 per year, allowing for the search of extremely rare decays, with branching fractions at the level of 10^-9. In order to reduce the acquisition rate to a sustainable level (order of 2 kHz), maintaining at the same time a high efficiency on the signals of interest, LHCb is provided with an efficient and flexible trigger system. LHCb, by means of its vertex detector, will be able to reconstruct the proper time of decays wi...

  5. Measurement of beauty-hadron decay electrons in Pb--Pb collisions at $\\sqrt{s_{NN}}$= 2.76 TeV with ALICE

    CERN Document Server

    Völkl, Martin

    2014-01-01

    The ALICE Collaboration at the LHC studies heavy-ion collisions to investigate the properties of the Quark-Gluon Plasma (QGP). Heavy quarks (charm and beauty) are effective probes for this purpose. Both their energy loss in the medium as well as their possible thermalization yield information about the medium properties. Experimentally, the reconstruction of hadrons with charm valence quarks is possible. For hadrons with beauty valence quarks a promising strategy is the measurement of their decay electrons. To separate these from the background electrons (mainly from charm hadron decays, photon conversions or light-meson decays) the large decay length of beauty hadrons can be utilized. It leads to a relatively large typical impact parameter of the decay electrons. By comparing the impact parameter distribution of the signal electrons with those from the background sources, the signal can be statistically separated from the background. For this purpose a maximum likelihood fit is employed using impact paramete...

  6. From the ψ to charmed mesons

    International Nuclear Information System (INIS)

    This talk deals with the author's recollections about the discoveries of the J/ψ the ψ' as well as psion spectroscopy and charmed mesons. He gives a chronology for the ψ and ψ' discoveries. He also discusses the events which led to the charmed meson discovery as well as detailed discussions on the proof that the resonance observed in the K- π+ system, at 1,865 MeV, was indeed the predicted charmed meson

  7. D mesons in a magnetic field

    CERN Document Server

    Gubler, Philipp; Lee, Su Houng; Oka, Makoto; Ozaki, Sho; Suzuki, Kei

    2015-01-01

    We investigate the mass spectra of open heavy flavor mesons in an external constant magnetic field within QCD sum rules. Spectral ans\\"atze on the phenomenological side are proposed in order to properly take into account mixing effects between the pseudoscalar and vector channels, and the Landau levels of charged mesons. The operator product expansion is implemented up to dimension--5 operators. As a result, we find for neutral D mesons a significant positive mass shift that goes beyond simple mixing effects. In contrast, charged D mesons are further subject to Landau level effects, which together with the mixing effects almost completely saturate the mass shifts obtained in our sum rule analysis.

  8. Meson's Correlation Functions in a Nuclear Medium

    CERN Document Server

    Park, Chanyong

    2016-01-01

    We investigate meson's spectrum, decay constant and form factor in a nuclear medium through holographic two- and three-point correlation functions. To describe a nuclear medium composed of protons and neutrons, we consider a hard wall model on the thermal charged AdS geometry and show that due to the isospin interaction with a nuclear medium, there exist splittings of the meson's spectrum, decay constant and form factor relying on the isospin charge. In addition, we show that the rho-meson's form factor describing an interaction with pseudoscalar fluctuation decreases when the nuclear density increases, while the interaction with a longitudinal part of an axial vector meson increases.

  9. Meson's correlation functions in a nuclear medium

    Science.gov (United States)

    Park, Chanyong

    2016-09-01

    We investigate meson's spectrum, decay constant and form factor in a nuclear medium through holographic two- and three-point correlation functions. To describe a nuclear medium composed of protons and neutrons, we consider a hard wall model on the thermal charged AdS geometry and show that due to the isospin interaction with a nuclear medium, there exist splittings of the meson's spectrum, decay constant and form factor relying on the isospin charge. In addition, we show that the ρ-meson's form factor describing an interaction with pseudoscalar fluctuation decreases when the nuclear density increases, while the interaction with a longitudinal part of an axial vector meson increases.

  10. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01抗敏医美学>据说橄榄树非常长寿,可以健康地存活1000年,所以科学家相信橄榄树含有保持青春的成分,知名的皮肤科医生及抗衰老专家Nicholas Perricone博士研发的Perricone MD护肤品牌,就是以橄榄叶及其果实的天然分子橄榄多酚为敏感肌肤带来有效护理的抗衰老系列。

  11. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Chris

    2010-01-01

    <正>01Christian Dior贵族淑女踏春归来随着马蹄声的配乐响起,Christian Dior宣布贵族淑女的时代回归。绣花、珍珠、花朵这些春意盎然的细节都运用到了薄纱以及各种轻盈的材质上。马鞭与马靴还有骑马的高帽搭配着长裙,优雅帅气的骑士装扮瞬间抓住了在场女士们的心。在妆容上,化妆师

  12. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01闪耀细胞思维论〉Cle de Peau Beaute认为每一个皮肤细胞,犹如脑细胞一样,能够自我思考。它们均具有处理各种情报的能力,只要有效管理细胞使之接收更多正面讯息,阻截负面情报,提升肌肤本身的机制优化细胞机能,便能诱导更多正面讯息能量的吸收,从而改善皮肤质量。而全新Basic Care系列,便是因应闪耀细胞管理而研发。

  13. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Jasmine; Chris

    2010-01-01

    <正>022010 Chanel春夏高级成衣发布会后台彩妆探秘在这场仿佛是法国皇后Marie Antoinette在凡尔赛宫的小农庄重现的时装秀上,除了精致奢华的新款时装令人眼前一亮之外,彩妆创意总监Peter Phillips在妆容上也为我们带来了新一年的流行趋势,那就是以高雅别致的米色调为主,打造令人耳目一新、清新富有朝气的妆容。这种邻家女孩味十足的妆容效果,基本适合所有的女性,所有的场合。如果你嫌妆容过于"平淡",那

  14. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01皇室御用彩妆盒〉Cle de peau Beaute邀得皇室御用珠宝设计师Shaun Leane,为春夏特别推出的Luminizing Face Enhancer设计一个闪烁夺目的盒子。Shaun Leane曾任皇室御用珠宝师及Alexander McQueen的首席珠宝设计师。他是英国FlPG获奖者,该奖项专门表扬技术超凡的珠宝匠师。精美闪烁的宝石切割面粉盒,一丝不苟的设计,令彩妆盒精致如珠宝盒一样,带有高贵优雅气派。Shaun Leane指出:"最初构思包装设计时,第一个念头是塑造既富触感又美观的盒子。在美感方面,我们希望设计宛如一件多琢面的

  15. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Kidd Ji

    2010-01-01

    <正>01Rene Gruau与美妆传承法国画家Rene Gruau的重要,不仅来自他独特的虚实结合水彩风格,将东西方绘画艺术相结合,令20世纪中期的人们耳目一新。他与Dior品牌合作,让插画与Dior在50年代推出的"New Look"风格紧密结合,流畅大气的线条勾勒出明显的女性曲线,修身、高雅、大气,这些插画与人们脑中的Dior服饰产生了不可分割的联系。2010年11月10日至2011年1月9日,名为"Dior插画展:Rene Gruau与美妆传承"的展览将于伦敦萨默塞特宫隆重举行。这场展览将向公众展现里程碑式的艺术珍品,荟集了经严格甄选的Dior高级定制礼服,以及Gruau特别为Dior香水化妆品品牌、古董香水瓶、时装手绘稿和杂志精心绘就的原创插画。六位英国出生的插画家亦将应邀在此次展览中展示画作,Gruau与Dior迪奥品牌的无间合作正是他们的灵感源泉。

  16. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Paris; Sun

    2011-01-01

    <正>01美妆拜占庭拜占庭艺术(Byzantine art)指东罗马帝国的艺术。大体来说,所有拜占庭的艺术都充满了精神的象征主义。重视心象,不容有写实主义的存在。为配合Chanel巴黎一拜占庭高级手工坊系列成衣发布,Chanel全球彩妆创意总监彼德·菲利浦斯以世界知名的狄奥多拉女皇Theodora的马赛克肖像图为灵感创作了一组妆容,而肖像图中女皇眉峰部分所描绘的红色眼影线条,被他用作了这次妆

  17. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Kidd Ji

    2010-01-01

    <正>01Chanel 2010 Couture Makeup在高级订制服的秀场上,时装及配饰不但影响着未来一至两季的服装潮流,模特的妆容作为整个系列的点睛之笔,也对妆容的流行指明方向。由Chanel全球彩妆创意总监Peter Philips为秋冬高级订制系列创作的红色概念妆容就是其中一个例子。Peter Philips表示,他的设计概念来自Karl Lagerfeld向他展示的设计草图:"我发现他在所有的模特嘴上都加上了一抹红色。而他展示给我看的第一件外套也是红色

  18. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01救生员认可的有机防晒美国生态环境研究专家Chris Birchby的家人,不幸患上黑色素瘤,令他明白防晒的重要,同时作为生态环境研究专家,他亦希望护肤品不会加重地球的负担,所以研发出防晒品牌COOLA,以有机天然成分为主,同时以物理性及化学性的防晒配方,推出高效的防晒产品,除了获得各个有机认证外,亦获得美国救生员协会的认可。

  19. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Kidd Ji

    2010-01-01

    <正>01悦木之源"眼咖啡">一直以为,累了、困了只要一杯咖啡就能提神解乏。却没想到,咖啡的活力还能喂进眼睛里,仿佛永远没有睡醒的倦怠双眼,在遇见悦木之源人参活力焕亮眼霜之后便能苏醒。这款在业界素有"精神眼霜"、"眼咖啡"、"加班眼霜"等众多俏皮昵称的Origins GinzingTM人参活力焕亮眼霜优选两款醒神植物能量——"百草之王"人参与"醒神之王"咖啡,同时融汇了冬虫夏草、木兰花、锦紫苏、橙皮苷、黄芩、绿茶等多种活力秘方,能够有效针对改善黑眼圈、眼部浮肿和眼疲劳等眼部问题,仿佛给倦眼来一杯Espresso。

  20. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01蜗牛美容秘辛〉早于1980年,智利皮肤科医生Mr.Fernando Bascunan就已发现蜗牛分泌物具有非凡的护肤功效。当时他的家族以养殖蜗牛为生,并出口至欧洲各国成为美食。多年来在处理蜗牛的过程中,Fernando Bascunan意外地发现,工人被工具刮伤的患处不但没有发炎伤口愈合会更快,也不会留下疤痕。自此以后,他就开始对蜗牛进行研究,发现蜗牛黏液可在人类皮肤上产生嫩肤、再生及修复的神奇功效。近年来不少美容品牌都开始投放资源,研发蜗牛黏液护肤品,其中来自韩国的MISSHA,以韩国锦

  1. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01意大利大家闺秀>Valentino除了经典的火红女郎形象外,近年时装秀的蕾丝都充分表现出品牌对女性妩媚的诠释。而今次Valentino的首支吞氛更是为其女性时装及生活方式所启发。为了这支香氛像是一束综合了多种鲜花精炼而成的香味,选用的材料都极度女性化,充分代表了Valentino女性的独特气质,因此便以Valentina命名。品牌邀两位杰出的调香师:Oliver Cresp

  2. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01从不泛黄的照片谈美白>现在什么都谈数码化,数码相机的科技水平也越来越高,但是十分值得纪念的相片,还是会有冲印出来的冲动。富士牌的相机胶卷你一定听过用过吧,用它冲印出来的相片,不论经过多少年,相片上的颜色不只没有泛黄,更没有褪色。原来,照相的相机胶卷是用骨胶原制成的。相同道理,如果富士能将相机胶卷用的骨胶原保持最佳状态,它们亦会知道怎样保护我们皮肤的骨胶原。所以当富士推出Fijifilm beauty系列,对女士们来说,可谓福音!

  3. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01摩诃之美>摩诃本为梵文,在佛教中有超越有情与无情,在无边无际、有形与无形之间显得圆通神妙用的意思。正如Cle de PeauBeaute秋冬妆容系列,以光亮色彩从黑暗中反映出来,以阴影映衬着明亮的双眸,以光泽衬托出不一样的色彩。品牌的彩妆美容形象师Lucia Pieroni说:"色彩在黑暗中绽亮生辉,令眼影细滑如丝。炯炯有神的明眸,在色彩与质感交织下美丽迷人,映照神秘的黑夜。"而系列最新三款让人惊艳的眼影色调,以散发不同光芒的珠光组合塑造聚光焦点,色彩中若隐若现的光泽,在瞳孔中映照出神秘光芒,演绎高贵优雅的魅力。色调可随意混配,

  4. Beauty

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    <正>眉:自然生态眉首先要扭转精致、服帖、细长才是完美眉形的观念。选择比发色淡一度的眉粉自下眉头处1cm处为起点,向眉峰轻扫,进而顺延至眉尾,别忘记用余粉将眉毛边缘处做好过渡。最后用眉形修饰膏以先顺再逆的方向梳理眉毛,缔造根根分明的印象。眼:亚洲人的内陷式双眼皮,令彩色眼线往往不足以提升眼晴的精气神。双色眼线以深色在靠近内眼睑的位置铺底,此处精细和轻巧的眼尾上挑是关键,然后用明媚的彩色眼线以略宽出1~2cm的方式勾勒,霎时拥有明眸点睛的魅惑力。

  5. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01有机"炼金术">古时人们相信可以从金属中提炼长生不老的丹药,虽然现代科学已证实炼金术不能提炼所谓"仙丹",但却令人类对物质和化学有了进一步的认识和了解。因为这些知识,让我们可以从自然环境中萃取各种天然成分,合成及研发成各种不只对皮肤或身体有益的产品,更有效地减少了浪费和不必要的消耗。

  6. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Chris

    2010-01-01

    <正>01DNA科技注入睫毛膏>在护肤品中添加生物基因技术,已不再是什么大新闻。但你听说过,在睫毛膏里也加入这一科技吗?7月即将问市的Lancome全新梦魅臻采睫毛膏,就以兰蔻高科技研究成果为基础,加入了独一无二的基因配比技术,用以启动睫毛干细胞的活性,促进干细胞新生,仿佛为睫毛注入第二次生命般,让睫毛变长变密。同时,特别研制的刷头,可以更好的让膏体和睫毛接触,达到更完美的浓睫艳眸效果。www.lancome.com

  7. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Kidd; Ji; Paris; Sun

    2011-01-01

    <正>01纸艺幻发纸艺能成为备受关注的艺术形态,是因为纸本身拥有轻盈及可塑性强的特质,再配合极富想象力的创作,即能呈现出千变万化的视觉形象,承载无限艺术价值。沙宣认为头发与纸艺的创作概念如出一辙,今年冬季亦从纸艺中汲取灵感,设计出了轻盈、可塑的概念发型。以"逆重幻觉"为名的发型特辑借用纸艺"挣脱重力的束缚仿佛能够对抗万有引力的存在"这一概念,丰盈的发型在充满空气感的同时,造型上也十分具有纸张所带来的结构感。当被问及如何打造这样的发型时,其创意总监回答:"关键在于拥有轻盈可塑的健康秀发。"道理虽不难,达到却不易。

  8. Beauty

    Institute of Scientific and Technical Information of China (English)

    James; Stephen; Behrens; 王海强

    2006-01-01

    古往今来,人们一直通过语言、艺术或思考来探究人生的真谛。有人以追求人生的真理为乐,甚至是舍生取义;也有人在追求真理的过程中不断完善自己的生命。本文以朴实的文笔娓娓述说了一个令人深思而嗟叹的故事。故事女主人公相貌丑陋,但却以她独特的灵气、细腻的美感、动人的话语征服了人心。她对待人生的态度和生活的勇气,无疑会令所有的身体健康者汗颜!

  9. Beauty

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01澳大利亚有机美发>澳大利亚天然资源丰富,所以不少美容品牌都从当地的有机农庄获取原材料,主要因为有机草本成分内含的维他命、矿物质等营养成分比非有机草本植物高,同时有助减少吸收不必要的抗生素、农药等化学成分,令消费者更安心使用。澳洲进口品牌australian organics,在澳洲拥有十五年历史,产品包括面部护理、沐浴及身体护理以及头发护理系列。其有机成分获澳洲国家可持续农业协会机构(NASAA)认可,并属澳洲低碳产品商认可成员,全部产品均于澳洲制造,绝对不含石化成分、人造香料、色素及任何基因改造和动物测试,成分温和,容易吸收,特别适合亚洲人肌肤。品牌根据不同发质及肌肤需要,以天然草本成分调配不同配方外,亦以舒缓、减压、安抚情绪、助眠等有机香熏精华调配而成,让秀发及头部皮肤获得细致呵护之余,于感官上也同时得到洗涤,令日常护理程序变得更轻松。

  10. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    <正> 今年起,说到最有效的抗氧化成分,你脑中该留下一个新名词"IDEBENONE 艾地苯"。这种由 ELIZABETH ARDEN 携手 BOTOX 肉毒杆菌素的创造者——ALLERGAN 联手推出的新成分已被运用在"PREVAGE 逆时橘灿精纯凝露"中,掀起了全球医学美容热潮。被称为"抗氧化超人"的它在18岁后即可每天使用,对抗光老化及预防皱纹。

  11. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Chris

    2010-01-01

    <正>01帝王之水典藏版华丽开售>现在你不必亲身飞到巴黎或香港等地,Guerlain巴黎之家专属限量香氛上海梅龙镇伊势丹精品专柜店将在7月隆重揭幕。作为国内唯一一家精品店,也是香榭丽舍大道68号LaMaison Guerlain娇兰之家的华丽缩影,在此你可以独家购买到帝王之水金箔蜂姿琉金典藏版等多款限量版香水。帝王之水乃品牌创始人Pierre Francois Pascal为法国Eugenie皇后特别制作的新婚礼物,清新、芬芳而怡神的它,是橙花、香橼、柠檬、

  12. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Kidd; Ji; Paris; Sun

    2011-01-01

    <正>01一片蓝心向北非Giorgio Armani用一种颜色完成了2011春夏女装秀,撒哈拉沙漠中部游牧民族图阿雷格人的文化就是其女装的灵感来源。而品牌彩妆的特质在于其质感和色彩都基于时装的灵感、布料的材质之上。2011年春夏妆容,其灵感同样延续来自图阿雷格人面纱的颜色——靛蓝。设计师Giorgio Armani认为:"蓝与黑的搭配会让经典的黑色更有生命力。"通过对蓝色和黑色搭配的重新诠释,赋予了品牌招牌式优雅更富故事性与情境感的篇章。

  13. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Chris

    2010-01-01

    <正>01至真"纸"美>美国时装真人秀节目《Project Runway》在最近的一期节目里,请参赛者们用牛皮纸来代替寻常的布料,做出属于自己的牛皮纸时装,结果平时表现平平的参赛者都发挥得不错。原因何在?牛皮纸那朴实无华,却坚韧有型的特色赋予了"材料"更多的可塑性,同时也呼应了当下全球大热的

  14. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>眼部的流线美学2014秋冬的T台妆容,醒目又流畅的眼妆深入人心,能够一根根修饰睫毛的睫毛刷,触感光滑柔软的丝绒效果眼影,勾勒夸张猫眼效果的厚泽眼线,所有的产品都重在打造自然流畅中可扩大眼形的清秀眼妆。01细致巧妙地提亮肌肤疲惫黯淡区域圣罗兰明彩笔1#2.5ml/RMB36002柔滑质感与千变万化的妆效圣罗兰臻彩四色眼影5#5g/RMB56003惊艳系列,打造含情脉脉的眼神迪奥单色眼影3g/RMB31004打造诱惑双眸的波普粉色迪奥魅惑睫毛膏9ml/RMB36005精致珍珠母贝令双眸晶莹闪亮希恩黎植物炫彩眼影06极其柔软,幼滑的眼线笔希思黎植物丝缎眼线笔

  15. Beauty

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    一年之中,可以好好重整肌肤状况的有两个时段,分别是3,4月和10,11月,这两个时节,肌肤刚从剧烈的换季变化中回复平稳,最适合趁机除去累积的废物,并补充肌肤所需的营养,就像大病之后需要恢复元气一样。

  16. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01植村秀东京眼妆美学〉植村秀这彩妆品牌相信是不少潮流达人的心头好,不只因为其一流品质,更因为品牌从来以"不停构思改进与发掘"为哲学,不断推陈出新。今季炎夏,配合自由配搭彩妆盒,及全新系列眼影色系,品牌打造个人独特的彩妆盒。彩妆盒由日本著名建筑师干久美子设计,简洁优雅之余,亦令彩妆盒不需使用任何黏贴工具,亦能轻松替换眼影及胭脂组合。

  17. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01好莱坞巨星的活肤秘诀>由匈牙利皮肤科医生Dr.Laszlo创办的纽约品牌Emo Laszlo,一直深受皇室名人及好莱坞巨星的喜爱,今年是Emo Laszlo创立八十五周年,特别以五位家喻户晓的好莱坞女星为灵感,推出八十五周年限量版好莱坞尊贵系列。五款尊贵系列的原装产品分别为珍珠亮采唤肤啫喱、魅惑水润修护眼霜、Refresh尊贵宝石再生补湿霜、搪瓷肌抗氧化修护霜及丝滑

  18. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Kidd Ji

    2010-01-01

    <正>01逆转光老化>光老化是目前被认为肌肤衰老的最大元凶。有害的紫外线深入肌肤深处,直接伤害细胞DNA,破坏肌肤自我更新过程,同时引发自由基,对肌肤造成进一步的间接伤害。在美国,激光被运用在光老化引起的皱纹、松弛的肌肤治疗上,因为术后红肿的反应并不多,所以很多人都能接受。但你需要为之付出疼痛感和一到两万元的高额费用。随着美容产品技术的提高与开发,基于医学美容的CLINIQUE

  19. Beauty

    Institute of Scientific and Technical Information of China (English)

    Jasmine; Chris

    2010-01-01

    <正>03Jean Paul Gaultier 2010春夏高级订制:梦游"奇幻乐园"〉老顽童Jean Paul Gaultier这次给彩妆大师Tom Pecheux出了一个趣味横生的妆容课题—fantasy land。于是Tom Pecheux把墨西哥人、外星人、甚至是热映的电影《Avatar》都搬上了T台。模特们的妆容被大自然的缤纷色彩所填满,限部以天空蓝、植物绿、夕阳橙和大地黄为

  20. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Paris; Sun

    2011-01-01

    <正>01Aesop来自澳洲的"伊索寓言">"伊索寓言"在巴黎上演,Aesop巴黎店最新橱窗展,伊索灵魂漫游于方寸橱窗间。成立于1987年的澳洲品牌伊索(Aesop),在纯天然植物护肤的基础上率先推行有机理念,并结合内外调理的"理智"生活哲学。出身于拥有最多濒临绝种的奇花异草、珍禽怪兽的澳大利亚净土,品牌从研发、测试到

  1. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01台湾有机>说起护肤品的出产地,瑞士美国等欧美传统美容王国当然占市场大部分位置,但有时候因气候水土不同,在美国用起来一流的产品,来到亚洲可能就要大打折扣。近年除了韩国,台湾出产的美容护肤产品亦大受欢迎,除了一流的质量外,价位亦十分相宜。以统欣生物科技公司旗下品牌之一Deary媞尔妮为例,在身体及脸部保养品领域开发专研,以有机草本原料,配合独特研发技术,其面膜销售更是台湾连锁便利店排行第一。统欣生物科技公司,除了研发有效的护肤品之余,亦对护

  2. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Jasmine; Chris

    2009-01-01

    <正>01寻找秋冬发型灵感>Aveda刚发表了新一季发型及发色潮流造型照,品牌的环球创作总监Antoinette Beenders介绍这系列灵感启发自80年代的歌德式华丽,他说:"今季的造型设计大量运用了复古味极浓的经典剪裁和发色。"一如以往,Aveda的造型设计无论是发型及发色都相当实用,参考价值甚高,想改变造型又没有头绪的话,可到品牌的网址找找合心意的发色与发型,更有来自世界各地的造型师所提供的理发建议。除此之外,可留意这辑造型照的另一个特别之处:模特儿所穿的礼服,全采用可循环再用的物料制造,如旧报纸、旧牛仔布料及风衣等,重新解构再造,非常合乎Aveda的环保原则。

  3. Beauty

    Institute of Scientific and Technical Information of China (English)

    Jasmine; Chris

    2010-01-01

    <正>01沪上定制妆容〉香奈儿巴黎——上海高级手工坊将时尚大帝Karl Lagerfeld和彩妆大师Peter Philips都带来了上海,除了为上海度身定做的华服之外,那颇有东方韵味的妆容也令人印象深刻。Peter在采访中透露这次妆面的灵感来自Karl给他看的一部电影——《花样年华》。模特们的妆容需要看上去既要有像张曼玉穿旗袍时的优雅,又能表现出如未来女战士般的魄力。正如服装秀一开场,模特们所穿着服装的灵

  4. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie Kwok

    2012-01-01

    <正>01世界海洋大同>La Mer的世界海洋日活动,不仅要提升大家对海洋美态和修复力量的关注,更要呼吁人们对它脆弱的生态多加爱惜。La Mer相信海洋植物如太平洋海藻,其惊人力量尚未被完全发掘及理解,所以我们应全力支持生态保育,为下一代守护并保存这大自然的瑰宝。今年的世界海洋日活动鼓励大众探索、发掘和欣赏海洋宝库。La Mer特别设计了一百毫升的世界海洋日Creme de la Mer限量版面霜,瓶身设计的灵感亦撷取

  5. BEAUTY

    Institute of Scientific and Technical Information of China (English)

    Katie; Kwok

    2011-01-01

    <正>01Burberry Body全新香氛>Burberry Body找来英国女演员兼模特儿Rosie Huntington-Whiteley,让她成为品牌的第一位代言人,从她身上完美地体现出感性、自信和谦逊的平衡。全新香氛使用的成分亦不简单,除了以天然玫瑰精油和香草为基调外,前调的苦艾酒曾一度是欧洲禁酒,也是梵高每次画画必喝的最爱。品牌还在香水瓶上花了不少心思,品牌刨作总监Christopher Bailey表示:"我常将

  6. Bathing in Reeking Wounds: The Liberal Arts, Beauty, and War

    Science.gov (United States)

    Stimpson, Catharine R.

    2014-01-01

    A historic dialectic exists between the beautiful and the bestial. The bestial destroys the beautiful, but in a bloody miracle, the beautiful emerges from the womb of the bestial, the "terrible beauty" of which the poet W. B. Yeats wrote. The liberal arts, so often thought to dwell in a remote ivory tower, embody this dialectic. Wars and…

  7. Beauty and Cuteness in Peripheral Vision

    Directory of Open Access Journals (Sweden)

    Kana eKuraguchi

    2015-05-01

    Full Text Available Guo, Liu, & Roebuck (2011 showed that attractiveness was detectable in peripheral vision. Since there are different types of attractiveness (Rhodes, 2006, we investigated how beauty and cuteness are detected in peripheral vision with a brief presentation. Participants (n = 45 observed two Japanese female faces for 100 ms, then were asked to respond which face was more beautiful (or cuter. The results indicated that both beauty and cuteness were detectable in peripheral vision, but not in the same manner. Discrimination rates for judging beauty were invariant in peripheral and central vision, while discrimination rates for judging cuteness declined in peripheral vision as compared with central vision. This was not explained by lower resolution in peripheral vision. In addition, for male participants, it was more difficult to judge cuteness than beauty in peripheral vision, thus suggesting that gender differences can have a certain effect when judging cuteness. Therefore, central vision might be suitable for judging cuteness while judging beauty might not be affected by either central or peripheral vision. This might be related with the functional difference between beauty and cuteness.

  8. Strong decays of vector mesons to pseudoscalar mesons in the relativistic quark model

    Directory of Open Access Journals (Sweden)

    D. Ebert

    2015-05-01

    Full Text Available Strong decays of vector (S13 mesons to the pair of pseudoscalar (S01 mesons are considered in the framework of the microscopic decay mechanism and the relativistic quark model based on the quasipotential approach. The quark–antiquark potential, which was previously used for the successful description of meson spectroscopy and electroweak decays, is employed as the source of the qq¯ pair creation. The relativistic structure of the decay matrix element, relativistic contributions and boosts of the meson wave functions are comprehensively taken into account. The calculated rates of strong decays of light, heavy-light mesons and heavy quarkonia agree well with available experimental data.

  9. Strong decays of vector mesons to pseudoscalar mesons in the relativistic quark model

    CERN Document Server

    Ebert, D; Galkin, V O

    2014-01-01

    Strong decays of vector ($^3S_1$) mesons to the pair of pseudoscalar ($^1S_0$) mesons are considered in the framework of the microscopic decay mechanism and the relativistic quark model based on the quasipotential approach. The quark-antiquark potential, which was previously used for the successful description of meson spectroscopy and electroweak decays, is employed as the source of the $q\\bar q$ pair creation. The relativistic structure of the decay matrix element, relativistic contributions and boosts of the meson wave functions are comprehensively taken into account. The calculated rates of strong decays of light, heavy-light mesons and heavy quarkonia agree well with available experimental data.

  10. Measurement of B meson production in pp collisions at √(s) = 2.76 TeV and √(s) = 7 TeV via displaced electrons in ALICE

    International Nuclear Information System (INIS)

    Measurements of the production cross section of B mesons in pp collisions in ALICE are important in two respects. They allow to test perturbative quantum chromodynamics calculations, and they provide an essential reference for comparison with studies in heavy-ion collisions at high energies, in which a hot and dense medium, the quark-gluon plasma (QGP), is created. When passing through this medium, quarks lose energy via the strong interaction. Since the amount of energy loss is expected to depend significantly on the quark mass, beauty as the heaviest observable flavour is of particular interest for the exploration of QGP properties. The measurement of electrons from beauty hadron decays at mid-rapidity is presented for √(s)=2.76 TeV and √(s)=7 TeV. First, the electron identification in the ALICE central barrel, using the Time Projection Chamber (TPC) and Time Of Flight (TOF) detector, is outlined. An explanation of the selection of electrons from beauty hadron decays with a large impact parameter is given. It makes use of the B mesons' larger decay length (∼500 μ m) in comparison to D mesons and other background sources. The remaining electron background in the selected sample is estimated based on calculations using ALICE measured pt spectra. The resulting B meson pt spectra measured in pp collisions at √(s)=7 TeV in 2010 and at √(s)=2.76 TeV in 2011 are shown.

  11. Pig transgenesis by Sleeping Beauty DNA transposition

    DEFF Research Database (Denmark)

    Jakobsen, Jannik E.; Li, Juan; Kragh, Peter M.;

    2011-01-01

    disease models. In this report, we present transgenic pigs created by Sleeping Beauty DNA transposition in primary porcine fibroblasts in combination with somatic cell nuclear transfer by handmade cloning. Göttingen minipigs expressing green fluorescent protein are produced by transgenesis with DNA...... plasmid DNA. Our findings illustrate critical issues related to DNA transposon-directed transgenesis, including coincidental plasmid insertion and relatively low Sleeping Beauty transposition activity in porcine fibroblasts, but also provide a platform for future development of porcine disease models...... using the Sleeping Beauty gene insertion technology....

  12. Particle identification for beauty physics

    Energy Technology Data Exchange (ETDEWEB)

    Ludlam, T.

    1987-01-01

    We look briefly at the requirements for particle identification for possible beauty experiments at the Tevatron, both in the fixed target and the collider mode. Techniques presently in use in high energy physics experiments, and under development, should make sensitive experiments feasible. However, in all cases the present state of the art must be advanced to meet the necessary requirements for segmentation andor rate capability. The most fundamentally difficult challenges appear to be the efficient tagging of soft electrons (for the collider experiment) and the need to handle interaction rates up to /approximately/ 10/sub 9/ HZ in the fixed target mode. In both cases we can find ''in principle'' demonstrations that the requirements can be met. We have considered only the most basic prooperties of detectors, however, and the real answers will come from careful studies of details. 20 refs., 10 figs.

  13. Exhibition - Mathematics, A Beautiful Elsewhere

    CERN Multimedia

    2011-01-01

    From 21 October 2011 to 18 March 2012, the Fondation Cartier pour l’art contemporain will present the exhibition Mathematics: A Beautiful Elsewhere, an exhibition developed in association with the Institut des Hautes Études Scientifiques (IHÉS) and under the patronage of UNESCO. For this unprecedented event, the foundation invited mathematicians to work with artists with whom it has previously worked to create an exhibition that allows visitors to see, hear, do, interpret and think about mathematics. By bringing mathematics into its premises, the Fondation Cartier is itself undergoing the “sudden change of scenery” described by mathematician Alexandre Grothendieck. More information is available here. Fondation Cartier pour l’art contemporain 261, boulevard Raspail 75014 Paris http://fondation.cartier.com Private Visit For professors, researchers and all the staff of Mathematics departments...

  14. My beautiful hometown Gao Chun

    Institute of Scientific and Technical Information of China (English)

    王晟

    2010-01-01

    @@ In the southwestern part of Jiangsu Province,the southern suburbs of the ancient city of Nanjing,there is a magical and quaint land, distributing the heat,revealing fascinating charm like a brilliant pearl. It has natural ecology(自然生态),beautiful scenery and rich resources(富饶的资源)and has got the famous reputation of being a land of fish and rice(鱼米之乡 ).This is Gaochun, the Jiangnan Holy Land (江南胜地) called by the Qianlong emperor(乾隆皇帝)in Qing Dynasty and now it is one of the Top 100 Counties(百强县之一), Red Sun Corporation and Wu Jiazui Jinling First Richest Village belong to Gao Chun.

  15. Experimental situation of beauty oscillations

    International Nuclear Information System (INIS)

    The experimental situation of the evidences for beauty oscillations is reviewed. After a brief description of the formalism the results from the CERN proton-antiproton collider are described and compared with the results from electron-positron colliders. Whereas the experiments on the continuum measure a mixture of χs and χd the experiments on the Υ (4s) are only sensitive to χd. A forecast for 1992 is given and a method is described which allows to measure χs. A precision measurement of χs would allow to further constrain the CKM matrix and would eventually lead to a determination of the phase in the matrix

  16. Beautiful mirrors at the LHC.

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, K.; Shepherd, W.; Tait, T. M. P.; Vega-Morales, R.; High Energy Physics; Northwestern Univ; Univ. of California at Irvine

    2010-01-01

    We explore the 'Beautiful Mirrors' model, which aims to explain the measured value of A{sub FB}{sup b}, discrepant at the 2.9{sigma} level. This scenario introduces vector-like quarks which mix with the bottom, subtly affecting its coupling to the Z. The spectrum of the new particles consists of two bottom-like quarks and a charge -4/3 quark, all of which have electroweak interactions with the third generation. We explore the phenomenology and discovery reach for these new particles at the LHC, exploring single mirror quark production modes whose rates are proportional to the same mixing parameters which resolve the A{sub FB}{sup b} anomaly. We find that for mirror quark masses {approx}< 500 GeV, a 14 TeV LHC with 300 fb{sup -1} is required to reasonably establish the scenario and extract the relevant mixing parameters.

  17. Measurement of semi-electronic beauty-hadron decays via their impact parameter in pp collisions in ALICE

    Energy Technology Data Exchange (ETDEWEB)

    Heide, Markus Ansgar

    2014-03-19

    The measurement of beauty-hadron decays via the detection of electron tracks that are displaced from the primary vertex can be performed with ALICE, whose capabilities of electron identification and tracking fulfil all requirements for this task. While the large corresponding branching ratios guarantee sufficient yields of beauty-decay electrons at LHC energies, the wide electron impact parameter distribution due to the long lifetime and the decay kinematics of beauty hadrons allows for a separation of electrons from beauty-hadron decays from background electrons on a statistical basis. This thesis presents the analysis of electrons from beauty-hadron decays in protonproton collisions at centre-of-mass energies of 7 TeV and 2.76 TeV. Using the ALICE central-barrel detectors ITS, TPC, and TOF, p{sub T}-differential electron spectra are measured at mid-rapidity (vertical stroke y vertical stroke <0.8) for transverse momenta between 1 and 8 GeV/c. Information from the TPC and TOF signal is combined to select pure electron samples, whose signal-to-background ratio is subsequently enhanced via the requirement of a minimal impact parameter of the tracks towards the primary vertex in the x - y plane. Tracks from photon conversions occurring outside the innermost ITS layer, which have a wide impact parameter distribution, are rejected via the requirement of hits in both SPD layers of the ITS. The remaining hadron contamination in the selected electron track samples is determined on a statistical basis from the distributions of their energy deposition per unit of length in the TPC. A crucial challenge of this analysis is the subtraction of the electron background originating from charm decays, photon conversions, and light-meson decays from the measured inclusive electron spectrum. The corresponding electron yields are determined using spectra from PYTHIA simulations that are reweighted based on previous measurements of charmed hadrons, π{sup 0}, and η. Minor

  18. Is beauty skin deep – an approach to a beautiful face

    Directory of Open Access Journals (Sweden)

    Neerja Puri

    2014-07-01

    Full Text Available Everyone dreams of a beautiful and flawless face but true beauty is God given gift. Plastic surgery and various filler techniques can just highlight certain features and are just the temporary procedures. Features that further enhance the attractiveness of a beautiful face are the hair, skin, and teeth. These areas are the easiest to routinely enhance. There are many methods of facial sculpting including botulinum toxin, fillers and various other invasive plastic surgery techniques.

  19. Is beauty skin deep – an approach to a beautiful face

    OpenAIRE

    Neerja Puri

    2014-01-01

    Everyone dreams of a beautiful and flawless face but true beauty is God given gift. Plastic surgery and various filler techniques can just highlight certain features and are just the temporary procedures. Features that further enhance the attractiveness of a beautiful face are the hair, skin, and teeth. These areas are the easiest to routinely enhance. There are many methods of facial sculpting including botulinum toxin, fillers and various other invasive plastic surgery techniques.

  20. Past and Future Perfect? Beauty, Affect and Hope

    OpenAIRE

    Coleman, Rebecca

    2010-01-01

    This article engages with and draws on what have been called two recent “turns” in feminist theory: to beauty and to affect. While much feminist research has concentrated on the beauty industry, where beauty is conceived as a series of economic, social and cultural practices, the authors suggest that beauty should also be understood as an embodied affective process. The authors’ focus is on understanding the conceptions of beauty that emerged in their own empirical work with white British gir...

  1. Pseudotensor mesons as three-body resonances

    CERN Document Server

    Roca, L

    2011-01-01

    We show that the lightest pseudotensor mesons J^{PC}=2^-+ can be regarded as molecules made of a pseudoscalar (P) 0^-+ and a tensor 2^++ meson, where the latter is itself made of two vector (V) mesons. The idea stems from the fact that the vector-vector interaction in s-wave and spin 2 is very strong, to the point of generating the 2^++ tensor mesons. On the other hand the interaction of a pseudoscalar with a vector meson in s-wave is also very strong and it generates dynamically the lightest axial-vector mesons. Therefore we expect the PVV interaction to be strongly attractive and thus able to build up quasibound PVV resonances. We calculate the three body PVV interaction by using the fixed center approximation to the Faddeev equations where the two vectors are clustered forming a tensor meson. We find clear resonant structures which can be identified with the pi_2(1670), eta_2(1645) and K^*_2(1770) (2^-+) pseudotensor mesons.

  2. Scalar and axial-vector mesons

    CERN Document Server

    Van Beveren, E; Beveren, Eef van; Rupp, George

    2007-01-01

    Nowadays, there exists an abundance of theoretical approaches towards the mesonic spectrum, ranging from confinement models of all kinds, i.e., glueballs, and quark-antiquark, multiquark and hybrid configurations, to models in which only mesonic degrees of freedom are taken into account. Nature seems to come out somewhere in the middle, neither preferring pure bound states, nor effective meson-meson physics with only coupling constants and possibly form factors. As a matter of fact, apart from a few exceptions, like pions and kaons, Nature does not allow us to study mesonic bound states of any kind, which is equivalent to saying that such states do not really exist. Hence, instead of extrapolating from pions and kaons to the remainder of the meson family, it is more democratic to consider pions and kaons mesonic resonances that happen to come out below the lowest threshold for strong decay. Nevertheless, confinement is an important ingredient for understanding the many regularities observed in mesonic spectra...

  3. Dynamically generated open and hidden charm mesons

    CERN Document Server

    Gamermann, D; Strottman, D; Vacas, M J Vicente

    2007-01-01

    In this presentation I explain our framework for dynamically generating resonances from the meson meson interaction. Our model generates many poles in the T-matrix which are associated with known states, while at the same time new states are predicted.

  4. New results of radiative meson decays

    International Nuclear Information System (INIS)

    We have investigated Coulomb dissociation (the Primakoff effect) of high energy charged r and K mesons on heavy nuclei. New values for the electromagnetic transition rates G(p-→rg) and G(K-→K-g) have been extracted from the data. Some preliminary data for the Primakoff production of higher meson excitations will also be presented

  5. Sigma meson in heavy ion collision

    International Nuclear Information System (INIS)

    We want to present a short theoretical prediction of the behaviour of the sigma meson in heavy ion collisions. It is considered that the sigma meson is a pion-pion correlation, resulting from the decay of the N*(1440) resonance. There will be presented some QMD simulations. (authors)

  6. Studies of Excited $D$ mesons in $B$ meson decays

    CERN Document Server

    AUTHOR|(CDS)2082679

    This thesis documents the studies of several three-body B + meson decays, each with a charged charmed meson in the final state. All analyses presented use a data sample recorded by the LHCb detector in 2011 and 2012, corresponding to an integrated luminosity of 3.0 $fb^{-1}$ of $pp$ collision data. The $B^{+} \\to D^{-}K^{+}\\pi^{+}$ and $B^{+} \\to D^{+}K^{+}\\pi^{-}$ decay modes are observed for the first time. The branching fraction of the favoured $B^{+} \\to D^{-}K^{+}\\pi^{+}$ decay mode is measured relative to the topologically similar $B^{+} \\to D^{-}\\pi^{+}\\pi^{+}$ decay and the $B^{+} \\to D^{-}K^{+}\\pi^{+}$ final state is used as a normalisation channel for the suppressed $B^{+} \\to D^{+}K^{+}\\pi^{-}$ decay branching fraction measurement. Searches are performed for the quasi-two-body decays $B^{+} \\to D^{+}K^{*}(892)^{0}$ and $B^{+} \\to D_{2}^{*}(2460)^{0}K^{+}$, using the sample of $B^{+} \\to D^{+}K^{+}\\pi^{-}$ candidate decays. No significant signals are observed for either decay mode and upper limits a...

  7. Status of chiral meson physics

    Energy Technology Data Exchange (ETDEWEB)

    Bijnens, Johan [Department of Astronomy and Theoretical Physics, Lund University, Sölvegatan 14A, SE 22362 Lund (Sweden)

    2016-01-22

    This talk includes a short introduction to Chiral Perturbation Theory in the meson sector concentrating on a number of recent developments. I discuss the latest fit of the low-energy constants. Finite volume corrections are discussed for the case with twisted boundary conditions for form-factors and first results at two-loops for three flavours for masses. The last part discusses the extension to other symmetry breaking patterns relevant for technicolour and related theories as well as the calculation of leading logarithms to high loop orders.

  8. Light meson radial Regge trajectories

    OpenAIRE

    Badalian, A.M.; Bakker, B. L. G.; Simonov, Yu. A.

    2002-01-01

    A new physical mechanism is suggested to explain the universal depletion of high meson excitations. It takes into account the appearance of holes inside the string world sheet due to $q\\bar{q}$ pair creation when the length of the string exceeds the critical value $R_1 \\simeq 1.4$ fm. It is argued that a delicate balance between large $N_c$ loop suppression and a favorable gain in the action, produced by holes, creates a new metastable (predecay) stage with a renormalized string tension which...

  9. ν' meson as pseudoscalar gluonium

    International Nuclear Information System (INIS)

    The problem of the ν' meson as a pseudoscalar gluonium within the systematic approach to the resonance physics is considered. QCD sum rules induced by the current Gsub(μν)sup(α)Gsub(μν)sup(α) tilde constructed form gluon field operators are derived. By saturating the sum rules the ν' rough estimates fro the ν' mass and its residue are given. The difference between the ν' and typical quark states such as the rho is noted. Breaking of the operator expansion by the instanton effects is discussed

  10. Meson Production and Space Radiation

    Science.gov (United States)

    Norbury, John; Blattnig, Steve; Norman, Ryan; Aghara, Sukesh

    Protecting astronauts from the harmful effects of space radiation is an important priority for long duration space flight. The National Council on Radiation Protection (NCRP) has recently recommended that pion and other mesons should be included in space radiation transport codes, especially in connection with the Martian atmosphere. In an interesting accident of nature, the galactic cosmic ray spectrum has its peak intensity near the pion production threshold. The Boltzmann transport equation is structured in such a way that particle production cross sec-tions are multiplied by particle flux. Therefore, the peak of the incident flux of the galactic cosmic ray spectrum is more important than other regions of the spectrum and cross sections near the peak are enhanced. This happens with pion cross sections. The MCNPX Monte-Carlo transport code now has the capability of transporting heavy ions, and by using a galactic cosmic ray spectrum as input, recent work has shown that pions contribute about twenty percent of the dose from galactic cosmic rays behind a shield of 20 g/cm2 aluminum and 30 g/cm2 water. It is therefore important to include pion and other hadron production in transport codes designed for space radiation studies, such as HZETRN. The status of experimental hadron production data for energies relevant to space radiation will be reviewed, as well as the predictive capa-bilities of current theoretical hadron production cross section and space radiation transport models. Charged pions decay into muons and neutrinos, and neutral pions decay into photons. An electromagnetic cascade is produced as these particles build up in a material. The cascade and transport of pions, muons, electrons and photons will be discussed as they relate to space radiation. The importance of other hadrons, such as kaons, eta mesons and antiprotons will be considered as well. Efficient methods for calculating cross sections for meson production in nucleon-nucleon and nucleus

  11. Results for light pseudoscalar mesons

    CERN Document Server

    Bazavov, A; DeTar, C; Du, X; Freeman, W; Gottlieb, Steven; Heller, Urs M; Hetrick, J E; Laiho, J; Levkova, L; Oktay, M B; Osborn, J; Sugar, R; Toussaint, D; Van de Water, R S

    2010-01-01

    We present the current status of the MILC collaboration's calculations of the properties of the light pseudoscalar meson sector. We use asqtad staggered ensembles with 2+1 dynamical flavors down to $a \\approx 0.045$ fm and light quark mass down to 0.05 $m_s$. Here we describe fits to the data using chiral forms from SU(3) chiral perturbation theory, including all staggered taste violations at NLO and the continuum NNLO chiral logarithms. We emphasize issues of convergence of the chiral expansion.

  12. The Relation between the ideal of beauty and dependent beauty in Kant's philosophy

    Directory of Open Access Journals (Sweden)

    Javad Amin

    2015-10-01

    Full Text Available Kant organizes his analysis in terms of four moments of the judgment of taste, each of which is supposed to contribute something essential to the complete exposition of the beautiful in "Critique of Judgment". He, in the third moment, based on the key concept analysis of "purposiveness", reaches to the beauty definition "a purposiveness without a purpose" (subjective purposiveness. Below this moment, two concepts of "dependent beauty" and "the ideal of beauty" also arises that aesthetic judgment in both of them is based on an objective purposiveness and a concept indicating nature of the object and the perfection of the object that is considered as default for judgment. This default in dependent beauty is perfection of the object and in the ideal of beauty is a concept from the sum of the rational idea and the aesthetic normal idea, but this point of view is in contradiction with the principle of Kant's aesthetic, which judgment of the beautiful just relies on the subjective purposiveness. This article reviewing the concept of purposiveness and the type of subjective purposiveness in the ideal of beauty and dependent beauty, attempts to explain the aesthetic value of these concepts and their differences and similarities, and finally to determine the position of these two concepts in Kant's philosophy.

  13. Spectroscopy of di-meson bound states in charm and beauty sector

    International Nuclear Information System (INIS)

    Very recently there exists increasing attention towards the study of four quark states as di-hadronic molecular states followed by the recent discovery of Zc(3900) state by two separate experimental groups BES III and BELLE Collaboration. The interpretation of the new state has triggered a considerable amount of theoretical work, especially due to the controversies related their internal structure. Moreover, very recently BELLE Collaboration has made the tantalizing observation of two new charged bottom resonances, namely Zb(10610) and Zb(10650)

  14. Scalar Meson Spectroscopy with Lattice Staggered Fermions

    CERN Document Server

    Bernard, Claude; Fu, Ziwen; Prelovsek, Sasa

    2007-01-01

    With sufficiently light up and down quarks the isovector ($a_0$) and isosinglet ($f_0$) scalar meson propagators are dominated at large distance by two-meson states. In the staggered fermion formulation of lattice quantum chromodynamics, taste-symmetry breaking causes a proliferation of two-meson states that further complicates the analysis of these channels. Many of them are unphysical artifacts of the lattice approximation. They are expected to disappear in the continuum limit. The staggered-fermion fourth-root procedure has its purported counterpart in rooted staggered chiral perturbation theory (rSXPT). Fortunately, the rooted theory provides a strict framework that permits the analysis of scalar meson correlators in terms of only a small number of low energy couplings. Thus the analysis of the point-to-point scalar meson correlators in this context gives a useful consistency check of the fourth-root procedure and its proposed chiral realization. Through numerical simulation we have measured correlators f...

  15. Vector meson condensation in a pion superfluid

    CERN Document Server

    Brauner, Tomas

    2016-01-01

    We revisit the suggestion that charged rho-mesons undergo Bose-Einstein condensation in isospin-rich nuclear matter. Using a simple version of the Nambu-Jona-Lasinio (NJL) model, we conclude that rho-meson condensation is either avoided or postponed to isospin chemical potentials much higher than the rho-meson mass as a consequence of the repulsive interaction with the preformed pion condensate. In order to support our numerical results, we work out a linear sigma model for pions and rho-mesons, showing that the two models lead to similar patterns of medium dependence of meson masses. As a byproduct, we analyze in detail the mapping between the NJL model and the linear sigma model, focusing on conditions that must be satisfied for a quantitative agreement between the models.

  16. Light Vector Mesons in the Nuclear Medium

    Energy Technology Data Exchange (ETDEWEB)

    Wood, Michael; Nasseripour, Rakhsha; Weygand, Dennis; Djalali, Chaden; Tur, Clarisse; Mosel, Ulrich; Muehlich, Pascal; Adams, Gary; Amaryan, Moscov; Amaryan, Moskov; Ambrozewicz, Pawel; Anghinolfi, Marco; Asryan, Gegham; Avagyan, Harutyun; Baghdasaryan, Hovhannes; Baillie, Nathan; Ball, James; Baltzell, Nathan; Barrow, Steve; Battaglieri, Marco; Bedlinskiy, Ivan; Bektasoglu, Mehmet; Bellis, Matthew; Benmouna, Nawal; Berman, Barry; Biselli, Angela; Blaszczyk, Lukasz; Bouchigny, Sylvain; Boyarinov, Sergey; Bradford, Robert; Branford, Derek; Briscoe, William; Brooks, William; Burkert, Volker; Butuceanu, Cornel; Calarco, John; Careccia, Sharon; Carman, Daniel; Carnahan, Bryan; Casey, Liam; Chen, Shifeng; Cheng, Lu; Cole, Philip; Collins, Patrick; Coltharp, Philip; Crabb, Donald; Crannell, Hall; Crede, Volker; Cummings, John; Dashyan, Natalya; De Vita, Raffaella; De Sanctis, Enzo; Degtiarenko, Pavel; Denizli, Haluk; Dennis, Lawrence; Deur, Alexandre; Dharmawardane, Kahanawita; Dickson, Richard; Dodge, Gail; Doughty, David; Dugger, Michael; Dytman, Steven; Dzyubak, Oleksandr; Egiyan, Hovanes; Egiyan, Kim; Elfassi, Lamiaa; Elouadrhiri, Latifa; Eugenio, Paul; Fedotov, Gleb; Feldman, Gerald; Feuerbach, Robert; Fradi, Ahmed; Funsten, Herbert; Garcon, Michel; Gavalian, Gagik; Gilfoyle, Gerard; Giovanetti, Kevin; Girod, Francois-Xavier; Goetz, John; Gordon, Christopher; Gothe, Ralf; Griffioen, Keith; Guidal, Michel; Guler, Nevzat; Guo, Lei; Gyurjyan, Vardan; Hadjidakis, Cynthia; Hafidi, Kawtar; Hakobyan, Hayk; Hakobyan, Rafael; Hanretty, Charles; Hardie, John; Hassall, Neil; Hersman, F.; Hicks, Kenneth; Hleiqawi, Ishaq; Holtrop, Maurik; Hyde, Charles; Ilieva, Yordanka; Ireland, David; Ishkhanov, Boris; Isupov, Evgeny; Ito, Mark; Jenkins, David; Jo, Hyon-Suk; Johnstone, John; Joo, Kyungseon; Juengst, Henry; Kalantarians, Narbe; Kellie, James; Khandaker, Mahbubul; Khetarpal, Puneet; Kim, Wooyoung; Klein, Andreas; Klein, Franz; Klimenko, Alexei; Kossov, Mikhail; Krahn, Zebulun; Kramer, Laird; Kubarovsky, Valery; Kuhn, Joachim; Kuhn, Sebastian; Kuleshov, Sergey; Lachniet, Jeff; Laget, Jean; Langheinrich, Jorn; Lawrence, David; Li, Ji; Livingston, Kenneth; Lu, Haiyun; MacCormick, Marion; Markov, Nikolai; Mattione, Paul; McAleer, Simeon; McKinnon, Bryan; McNabb, John; Mecking, Bernhard; Mehrabyan, Surik; Melone, Joseph; Mestayer, Mac; Meyer, Curtis; Mibe, Tsutomu; Mikhaylov, Konstantin; Minehart, Ralph; Mirazita, Marco; Miskimen, Rory; Mokeev, Viktor; Moriya, Kei; Morrow, Steven; Moteabbed, Maryam; Mueller, James; Munevar Espitia, Edwin; Mutchler, Gordon; Nadel-Turonski, Pawel; Niccolai, Silvia; Niculescu, Gabriel; Niculescu, Maria-Ioana; Niczyporuk, Bogdan; Niroula, Megh; Niyazov, Rustam; Nozar, Mina; Osipenko, Mikhail; Ostrovidov, Alexander; Park, Kijun; Pasyuk, Evgueni; Paterson, Craig; Pereira, Sergio; Pierce, Joshua; Pivnyuk, Nikolay; Pocanic, Dinko; Pogorelko, Oleg; Pozdnyakov, Sergey; Preedom, Barry; Price, John; Prok, Yelena; Protopopescu, Dan; Raue, Brian; Riccardi, Gregory; Ricco, Giovanni; Ripani, Marco; Ritchie, Barry; Ronchetti, Federico; Rosner, Guenther; Rossi, Patrizia; Sabatie, Franck; Salamanca, Julian; Salgado, Carlos; Santoro, Joseph; Sapunenko, Vladimir; Schumacher, Reinhard; Serov, Vladimir; Sharabian, Youri; Sharov, Dmitri; Shvedunov, Nikolay; Smith, Elton; Smith, Lee; Sober, Daniel; Sokhan, Daria; Stavinsky, Aleksey; Stepanyan, Stepan; Stepanyan, Samuel; Stokes, Burnham; Stoler, Paul; Strakovski, Igor; Strauch, Steffen; Taiuti, Mauro; Tedeschi, David; Tkabladze, Avtandil; Tkachenko, Svyatoslav; Todor, Luminita; Ungaro, Maurizio; Vineyard, Michael; Vlassov, Alexander; Watts, Daniel; Weinstein, Lawrence; Williams, Michael; Wolin, Elliott; Yegneswaran, Amrit; Zana, Lorenzo; Zhang, Bin; Zhang, Jixie; Zhao, Bo; Zhao, Zhiwen

    2008-07-01

    The light vector mesons ($\\rho$, $\\omega$, and $\\phi$) were produced in deuterium, carbon, titanium, and iron targets in a search for possible in-medium modifications to the properties of the $\\rho$ meson at normal nuclear densities and zero temperature. The vector mesons were detected with the CEBAF Large Acceptance Spectrometer (CLAS) via their decays to $e^{+}e^{-}$. The rare leptonic decay was chosen to reduce final-state interactions. A combinatorial background was subtracted from the invariant mass spectra using a well-established event-mixing technique. The $\\rho$ meson mass spectrum was extracted after the $\\omega$ and $\\phi$ signals were removed in a nearly model-independent way. Comparisons were made between the $\\rho$ mass spectra from the heavy targets ($A > 2$) with the mass spectrum extracted from the deuterium target. With respect to the $\\rho$-meson mass, we obtain a small shift compatible with zero. Also, we measure widths consistent with standard nuclear many-body eff

  17. Meson spectroscopy, quark mixing and quantum chromodynamics

    Energy Technology Data Exchange (ETDEWEB)

    Filippov, A.T.

    1979-04-01

    A semiphenomenological theory of the quark-antiquark meson mass spectrum is presented. Relativistic kinematic effects due to unequal quark masses and SU (3) -breaking effects in the slopes of Regge trajectories and in radially excited states are taken into account. Violation of the OZI rule is accounted for by means of a mixing matrix for the quark wave functions, which is given by QCD. To describe the dependence of the mixing parameters on the meson masses, a simple extrapolation of the QCD expressions is proposed from the ''asymptotic-freedom'' region to the ''infrared-slavery'' region. To calculate the masses and mixing angles of the pseudoscalar mesons, the condition for a minimal pion mass is proposed. The eta-meson mass is then shown to be close to its maximum. The predictions of the theory for meson masses and mixing angles are in good agreement with experiment.

  18. Strange and charm mesons at FAIR

    CERN Document Server

    Tolos, L; Gamermann, D; Garcia-Recio, C; Molina, R; Nieves, J; Oset, E; Ramos, A

    2009-01-01

    We study the properties of strange and charm mesons in hot and dense matter within a self-consistent coupled-channel approach for the experimental conditions of density and temperature expected for the CBM experiment at FAIR/GSI. The in-medium solution at finite temperature accounts for Pauli blocking effects, mean-field binding of all the baryons involved, and meson self-energies. We analyze the behaviour in this hot and dense environment of dynamically-generated baryonic resonances together with the evolution with density and temperature of the strange and open-charm meson spectral functions. We test the spectral functions for strange mesons using energy-weighted sum rules and finally discuss the implications of the properties of charm mesons on the D_{s0}(2317) and the predicted X(3700) scalar resonances.

  19. Neuroaesthetics and the trouble with beauty.

    Science.gov (United States)

    Conway, Bevil R; Rehding, Alexander

    2013-01-01

    Neuroscience is increasingly being called upon to address issues within the humanities. We discuss challenges that arise, relating to art and beauty, and provide ideas for a way forward. PMID:23526878

  20. Neuroaesthetics and the trouble with beauty.

    Directory of Open Access Journals (Sweden)

    Bevil R Conway

    Full Text Available Neuroscience is increasingly being called upon to address issues within the humanities. We discuss challenges that arise, relating to art and beauty, and provide ideas for a way forward.

  1. Charm, beauty and top at HERA

    Science.gov (United States)

    Behnke, O.; Geiser, A.; Lisovyi, M.

    2015-09-01

    Results on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed. This includes a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm- and beauty-quark masses. The impact of these results on measurements at the LHC and elsewhere is also addressed.

  2. Charm, Beauty and Top at HERA

    CERN Document Server

    Behnke, O; Lisovyi, M

    2015-01-01

    Results on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed. This includes a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm- and beauty-quark masses. The impact of these results on measurements at the LHC and elsewhere is also addressed.

  3. Charm, Beauty and Top at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Behnke, O.; Geiser, A.; Lisovyi, M.

    2015-06-15

    Results on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed. This includes a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm- and beauty-quark masses. The impact of these results on measurements at the LHC and elsewhere is also addressed.

  4. Hadronic couplings of open beauty states

    International Nuclear Information System (INIS)

    Strong interaction coupling parameters of particles with beauty quantum number are obtained using dispersion sum rules in various forms, e.g. current algebra sum rules, superconvergence sum rules and finite energy sum rules etc. These sum rules lead to a set of algebraic relations among masses and coupling constants. We compare the hadronic couplings of beautiful particles as obtained from various techniques and discuss their implications on the hadronic production of these states. (author)

  5. Lifetimes of charm and beauty hadrons

    International Nuclear Information System (INIS)

    Recent results on the lifetimes of charm and beauty hadrons at the LEP collider experiment and at the fixed target experiments E653 are reviewed and discussed. The world average of b lifetime is now =1.29±0.05 ps. The exclusive lifetime measurements for b+, b-, b0 are presented. The lifetime difference among the different species of charm and of beauty hadrons are discussed. (author) 25 refs., 13 figs., 12 tabs

  6. On the Beautiful and the Ugly

    OpenAIRE

    Herman Parret

    2011-01-01

    Classical aesthetics sees the experience of the beautiful as an anthropological necessity. But, in fact, the beautiful is rather the central category designating classical art, and one can question the relevance of this category considering contemporary art. The reference term most frequently used for contemporary art is interesting: works of art solicit the interests of my faculties (the cognitive-intellectual, the pragmatic community-oriented moral, the affective aesthetic faculties). It is...

  7. Charm, Beauty and Top at HERA

    International Nuclear Information System (INIS)

    Results on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed. This includes a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm- and beauty-quark masses. The impact of these results on measurements at the LHC and elsewhere is also addressed.

  8. The Viscosity of Meson Matter

    CERN Document Server

    Dobado, A; Dobado, Antonio; Llanes-Estrada, Felipe J.

    2003-01-01

    We report a calculation of the shear viscosity in a relativistic multicomponent meson gas as a function of temperature and chemical potentials. We approximately solve the Uehling-Uhlenbeck transport equation of kinetic theory, appropriate for a boson gas, with relativistic kinematics. Since at low temperatures the gas can be taken as mostly composed of pions, with a fraction of kaons and etas, we explore the region where binary elastic collisions with at least one pion are the dominant scattering processes. Our input meson scattering phase shifts are fits to the experimental data obtained from chiral perturbation theory and the Inverse Amplitude Method. Our results take the correct non-relativistic limit (viscosity proportional to the square root of the temperature), show a viscosity of order the cubed of the pion mass up to temperatures somewhat below that mass, and then a large increase due to kaons and etas. Our approximation may break down at even higher temperatures, where the viscosity follows a tempera...

  9. Pseudocalar meson and vector meson interactions and dynamically generated axial-vector mesons

    OpenAIRE

    Zhou, Yu; Ren, Xiu-Lei; Chen, Hua-Xing; Geng, Li-Sheng

    2014-01-01

    The axial-vector mesons $a_1(1260)$, $b_1(1235)$, $f_1(1285)$, $h_1(1170)$, $h_1(1380)$, and $K_1(1270)$ are dynamically generated in the unitized chiral perturbation theory. Such a picture has been tested extensively in the past few years. In this work, we calculate the interaction kernel up to $\\mathcal{O}(p^2)$ and study the impact on the dynamically generated axial-vector states. In anticipation of future lattice QCD simulations, we calculate the scattering lengths and the pole positions ...

  10. Measurement of beauty-hadron decay electrons in Pb-Pb collisions at \\sqrt{s_{NN}} = 2.76 TeV with ALICE

    Science.gov (United States)

    Völk, Martin; ALICE Collaboration

    2015-05-01

    The ALICE Collaboration at the LHC studies heavy-ion collisions to investigate the properties of the Quark-Gluon Plasma (QGP). Heavy quarks (charm and beauty) are effective probes for this purpose. Both their energy loss in the medium as well as their possible thermalization yield information about the medium properties. In ALICE, the reconstruction of exclusive decays is currently accessible for charm, but not for beauty hadrons. For hadrons with beauty valence quarks a promising strategy is the measurement of their decay electrons. To separate these from the background electrons (mainly from charm hadron decays, photon conversions or light-meson decays) the large decay length of beauty hadrons can be utilized. It leads to a relatively large typical impact parameter of the decay electrons. By comparing the impact parameter distribution of the signal electrons with those from the background sources, the signal can be statistically separated from the background. For this purpose a maximum likelihood fit is employed using impact parameter distribution templates from simulations. The resulting nuclear modification factor for electrons from beauty-hadron decays shows a sizeable suppression for pT > 3 GeV/c, albeit still with large uncertainties.

  11. Strong Couplings of Three Mesons with Charm(ing) Involvement

    CERN Document Server

    Lucha, Wolfgang; Sazdjian, Hagop; Simula, Silvano

    2016-01-01

    We determine the strong couplings of three mesons that involve, at least, one $\\eta_c$ or $J/\\psi$ meson, within the framework of a constituent-quark model by means of relativistic dispersion formulations. For strong couplings of $J/\\psi$ mesons to two charmed mesons, our approach leads to predictions roughly twice as large as those arising from QCD sum rules.

  12. Distortion of the HBT images by meson clouds

    CERN Document Server

    Hattori, K

    2009-01-01

    We study the effects of mesonic final state interactions on the Hanbury Brown and Twiss (HBT) intensity interferometry for mesons in ultra-relativistic heavy ion collisions. Modification of the one-body amplitude of emitted mesons while going through a cloud of other mesons is estimated in the semiclassical approximation with a mesonic optical potential which incorporates both coherent forward scattering with other mesons and the absorption due to the incoherent scattering in the meson clouds. We show how these effects results in the distortion of the HBT images.

  13. Exclusive φ meson production in HERMES

    Energy Technology Data Exchange (ETDEWEB)

    Golembiovskaya, Mayya

    2014-03-15

    In the present work exclusive φ meson leptoproduction at HERMES experiment in DESY was studied using the data collected at HERA accelerator in the period from 1998 till 2000 and from 2006 till 2007 years. In the analysis unpolarized and longitudinally polarized hydrogen and deuteron targets were used, the beam consisted of longitudinally polarized leptons. Via measurement of the angular and momentum distribution of the φ meson decay products 23 spin density matrix elements (SDMEs) for the φ meson were obtained. The number of SDMEs was defined by the experiment conditions, e.g. by the beam and target polarization directions. For the mentioned time period φ meson SDMEs were defined at HERMES for the first time. The quantities U{sub 1}, U{sub 2} and U{sub 3} which can be used to check presence of unnatural parity exchange (UPE) mechanism in phi meson production were calculated from SDMEs. All the results were obtained in 3 kinematic bins of Q{sup 2}, 4 kinematic bins of t' and for the integrated kinematics. No statistically significant difference between the results for hydrogen and deuteron targets was observed. The UPE quantities were found to be zero within 2 σ for the integrated kinematics, indicating negligible contribution of UPE for the φ meson production which is in agreement with theory predictions. The test of s-channel helicity conservation hypothesis via comparison of corresponding SDME values showed helicity conservation for the φ meson production.

  14. GlueX: Meson Spectroscopy in Photoproduction

    Energy Technology Data Exchange (ETDEWEB)

    Salgado, Carlos [Norfolk State University, JLAB; Smith, Elton S. [JLAB

    2014-03-01

    The goal of the GlueX experiment \\cite{gluex} is to provide crucial data to help understand the soft gluonic fields responsible for binding quarks in hadrons. Hybrid mesons, and in particular exotic hybrid mesons, provide the ideal laboratory for testing QCD in the confinement regime since these mesons explicitly manifest the gluonic degrees of freedom. Photoproduction is expected to be effective in producing exotic hybrids but there is little data on the photoproduction of light mesons. GlueX will use the new 12-GeV electron beam at Jefferson Lab to produce a 9-GeV beam of linearly polarized photons using the technique of coherent bremsstrahlung. A solenoid-based hermetic detector is under construction, which will be used to collect data on meson production and decays. These data will also be used to study the spectrum of conventional mesons, including the poorly understood excited vector mesons. This talk will give an update on the experiment as well as describe theoretical developments \\cite{Dudek:2011bn} to help understand how these data can provide insights into the fundamental theory of strong interactions.

  15. Quantum field theory approaches to meson structure

    International Nuclear Information System (INIS)

    Meson spectroscopy became one of the most interesting topics in particle physics in the last ten years. In particular, the discovery of new unexpected states in the charmonium spectrum which cannot be simply explained by the constituent quark model attracted the interest of many theoretical efforts. In the present thesis we discuss different meson structures ranging from light and heavy quark-antiquark states to bound states of hadrons-hadronic molecules. Here we consider the light scalar mesons f0(980) and a0(980) and the charmonium-like Y(3940), Y(4140) and Z±(4430) states. In the discussion of the meson properties like mass spectrum, total and partial decay widths and production rates we introduce three different theoretical methods for the treatment and description of hadronic structure. For the study of bound states of mesons we apply a coupled channel approach which allows for the dynamical generation of meson-meson resonances. The decay properties of meson molecules are further on studied within a second model based on effective Lagrangians describing the interaction of the bound state and its constituents. Besides hadronic molecules the effective Lagrangian approach is also used to study the radiative and strong decay properties of ordinary quark-antiquark (q anti q) states. The AdS/QCD model forms the completion of the three theoretical methods introduced in the present thesis. This holographic model provides a completely different ansatz and is based on extra dimensions and string theory. Within this framework we calculate the mass spectrum of light and heavy mesons and their decay constants.

  16. Materialised Ideals Sizes and Beauty

    Directory of Open Access Journals (Sweden)

    Kirsi Laitala

    2011-04-01

    Full Text Available Today’s clothing industry is based on a system where clothes are made in ready-to-wear sizes and meant to fit most people. Studies have pointed out that consumers are discontent with the use of these systems: size designations are not accurate enough to find clothing that fits, and different sizes are poorly available. This article discusses in depth who these consumers are, and which consumer groups are the most dissatisfied with today’s sizing systems. Results are based on a web survey where 2834 Nordic consumers responded, complemented with eight in-depth interviews, market analysis on clothing sizes and in-store trouser size measurements. Results indicate that higher shares of the consumers who have a body out of touch with the existing beauty ideals express discontentment with the sizing systems and the poor selection available. In particular, large women, very large men, and thin, short men are those who experience less priority in clothing stores and have more difficulties in finding clothes that fit. Consumers tend to blame themselves when the clothes do not fit their bodies, while our study points out that the industry is to blame as they do not produce clothing for all customers.

  17. The Ten Most Beautiful Experiments

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, George [The New York Times

    2010-10-20

    "Science in the 21st century has become industrialized. The experiments so often celebrated in the newspapers - sequencing the genome, proving the existence of the top quark, discovering a new planet by analyzing the wobble of a distant start - cost millions of dollars. They generate terabytes of data to be analyzed by supercomputers, calculating factories that spew out so much heat that they are equipped with cooling stacks and consume the energy of a small town. The experiments are carried out by research teams that have grown to the size of small corporations. But until very recently the most earth-shaking science came from individual pairs of hands. From a single mind confronting the unknown. The great experiments that mark the edges of our understanding were most often performed by one or two scientists and usually on a tabletop. Computation, if there was any, was carried out on paper or later with a slide rule. These experiments were designed and conducted with such straightforward elegance that they deserve to be called beautiful." (excerpt from the slide presentation accompanying the video)

  18. Photoproduction of $\\omega$ mesons off nuclei and impact of polarization on meson-nucleon interaction

    CERN Document Server

    Chudakov, E; Somov, A

    2015-01-01

    We consider photoproduction of $\\omega$ mesons off complex nuclei to study interactions of transversely and longitudinally polarized vector mesons with nucleons. Whereas the total cross section for interactions of the transversely polarized vector mesons with nucleons $\\sigma_T=\\sigma(V_TN)$ can be obtained from coherent photoproduction, measurements of vector meson photoproduction in the incoherent region provide a unique opportunity to extract the total cross section for longitudinally polarized mesons interacting with nucleons $\\sigma_L=\\sigma(V_LN)$, which has not yet been measured and strongly depends on theoretical approaches. This work is stimulated by the construction of the new experiment GlueX at Jefferson Lab, designed to study the photoproduction of mesons in a large beam energy range up to 12 GeV.

  19. Meson facility. Powerful new research tool

    International Nuclear Information System (INIS)

    A meson facility is being built at the Institute of Nuclear Research, USSR Academy of Sciences, in Troitsk, where the Scientific Center, USSR Academy of Sciences is located. The facility will include a linear accelerator for protons and negative hydrogen ions with 600 MeV energy and 0.5-1 mA beam current. Some fundamental studies that can be studied at a meson facility are described in the areas of elementary particles, neutron physics, solid state physics, and applied research. The characteristics of the linear accelerator are given and the meson facility's experimental complex is described

  20. Bottom-strange mesons in hyperonic matter

    OpenAIRE

    Pathak, Divakar; Mishra, Amruta

    2014-01-01

    The in-medium behavior of bottom-strange pseudoscalar mesons in hot, isospin asymmetric and dense hadronic environment is studied using a chiral effective model. The same was recently generalized to the heavy quark sector and employed to study the behavior of open-charm and open-bottom mesons. The heavy quark (anti-quark) is treated as frozen and all medium modifications of these bottom-strange mesons are due to their strange anti-quark (quark) content. We observe a pronounced dependence of t...

  1. Tetraquarks in the 1/N expansion and meson-meson resonances

    CERN Document Server

    Maiani, L

    2016-01-01

    Diquarks are found to have the right degrees of freedom to describe the tetraquark poles in hidden-charm to open-charm meson-meson amplitudes. Compact tetraquarks result as intermediate states in non-planar diagrams of the 1/N expansion and the corresponding resonances are narrower than what estimated before. The proximity of tetraquarks to meson-thresholds has an apparent role in this analysis and, in the language of meson molecules, an halving rule in the counting of states is obtained.

  2. Weak decays of the Bc meson to Bs and B mesons in the relativistic quark model

    International Nuclear Information System (INIS)

    Semileptonic and non-leptonic decays of the Bc meson to Bs and B mesons, caused by the c→s,d quark transitions, are studied in the framework of the relativistic quark model. The heavy quark expansion in inverse powers of the active c and spectator anti b quark is used to simplify calculations while the final s and d quarks in the Bs and B mesons are treated relativistically. The decay form factors are explicitly expressed through the overlap integrals of the meson wave functions in the whole accessible kinematical range. The obtained results are compared with the predictions of other approaches. (orig.)

  3. Brain correlates of aesthetic judgment of beauty.

    Science.gov (United States)

    Jacobsen, Thomas; Schubotz, Ricarda I; Höfel, Lea; Cramon, D Yves V

    2006-01-01

    Functional MRI was used to investigate the neural correlates of aesthetic judgments of beauty of geometrical shapes. Participants performed evaluative aesthetic judgments (beautiful or not?) and descriptive symmetry judgments (symmetric or not?) on the same stimulus material. Symmetry was employed because aesthetic judgments are known to be often guided by criteria of symmetry. Novel, abstract graphic patterns were presented to minimize influences of attitudes or memory-related processes and to test effects of stimulus symmetry and complexity. Behavioral results confirmed the influence of stimulus symmetry and complexity on aesthetic judgments. Direct contrasts showed specific activations for aesthetic judgments in the frontomedian cortex (BA 9/10), bilateral prefrontal BA 45/47, and posterior cingulate, left temporal pole, and the temporoparietal junction. In contrast, symmetry judgments elicited specific activations in parietal and premotor areas subserving spatial processing. Interestingly, beautiful judgments enhanced BOLD signals not only in the frontomedian cortex, but also in the left intraparietal sulcus of the symmetry network. Moreover, stimulus complexity caused differential effects for each of the two judgment types. Findings indicate aesthetic judgments of beauty to rely on a network partially overlapping with that underlying evaluative judgments on social and moral cues and substantiate the significance of symmetry and complexity for our judgment of beauty.

  4. Molecular status of non-qq mesons

    CERN Document Server

    Gerasyuta, S M

    2000-01-01

    The relativistic four-quark equations are found in the framework of the dispersion relation technique. The calculations of non-qq meson amplitudes estimate the contributions of three subamplitudes: four-quark amplitude, glueball amplitude and hadronic molekule amplitudes.

  5. (→ + - 0) meson photoproduction on proton

    Indian Academy of Sciences (India)

    Swapan Das

    2010-10-01

    The cross-section for the + - 0 invariant mass distribution in the $ p$ reaction in the GeV region is calculated. This reaction is assumed to proceed through the formation of the -meson in the intermediate state, because the production cross-section for this meson in the reaction in the GeV region is significant and it has a large branching ratio (88.8%) in the + − 0 channel. The cross-sections for this reaction are calculated using the energy-dependent reaction amplitude, → (0), extracted from the latest -meson photoproduction data. We use established procedure to calculate other factors, like width and propagator of the -meson, so that our calculation can provide reliable cross-section. The calculated results reproduce the measured + - 0 invariant mass distribution spectra in the reaction.

  6. Photo and electroproduction of heavy mesons

    International Nuclear Information System (INIS)

    This report reviews first the η0 photoproduction then the photoproduction vector mesons and presents some results. Finally, some notes on the experimental devices which should have to be developed to undertake this study are given

  7. The Jigsaw Puzzle of Scalar Mesons

    CERN Document Server

    Boglione, M

    2004-01-01

    This is a brief overview of light scalar meson spectroscopy, addressing longstanding problems, recent developments and future perspectives. In particular, a new comprehensive data analysis is introduced which will help to unravel the structure of the f_0(980).

  8. Kaons in flavor tagged B meson decays

    International Nuclear Information System (INIS)

    Using the ARGUS detector at the e+e- storage ring DORIS II, measurements of multiplicities of pseudoscalar kaons, of K*(892) and of φ(1020) in B meson decays have been performed through studies of angular and charge correlations between the above particles and high momentum leptons produced in semileptonic B decays. The method has made it possible to measure the multiplicities separately for B-mesons and anti-B-mesons. The excess of like charge lepton-kaon pairs over opposite charge pairs in semileptonic decays was used for estimating the ratio of charmed decays over all decays, and thus also the fraction of charmless decays. A search for an excess of fast neutral kaons from rare B decays was also made. All the results obtained support the assumption that almost all B mesons decay through b → c transitions into charmed hadrons. (66 refs.)

  9. Meson Condensation in Dense Matter Revisited

    OpenAIRE

    Yabu, Hiroyuki; Myhrer, F.; Kubodera, K.

    1994-01-01

    The results for meson condensation in the literature vary markedly depending on whether one uses chiral perturbation theory or the current-algebra-plus-PCAC approach. To elucidate the origin of this discrepancy, we re-examine the role of the sigma-term in meson condensation. We find that the resolution of the existing discrepancy requires a knowledge of terms in the Lagrangian that are higher order in density than hitherto considered.

  10. Bs mesons: semileptonic and nonleptonic decays

    Directory of Open Access Journals (Sweden)

    Albertus C.

    2014-01-01

    Full Text Available In this contribution we compute some nonleptonic and semileptonic decay widths of Bs mesons, working in the context of constituent quark models [1, 2]. For the case of semileptonic decays we consider reactions leading to kaons or different Jπ Ds mesons. The study of nonleptonic decays has been done in the factorisation approximation and includes the final states enclosed in Table 2.

  11. Meson condensation in dense matter revisited

    CERN Document Server

    Yabu, H; Kubodera, K; Yabu, Hiroyuki

    1994-01-01

    The results for meson condensation in the literature vary markedly depending on whether one uses chiral perturbation theory or the current-algebra-plus-PCAC approach. To elucidate the origin of this discrepancy, we re-examine the role of the sigma-term in meson condensation. We find that the resolution of the existing discrepancy requires a knowledge of terms in the Lagrangian that are higher order in density than hitherto considered.

  12. Meson and baryon spectroscopy on the lattice

    Energy Technology Data Exchange (ETDEWEB)

    David Richards

    2010-12-01

    Recent progress at understanding the excited state spectrum of mesons and baryons is described. I begin by outlining the application of the variational method to compute the spectrum, and the program of anisotropic clover lattice generation designed for hadron spectroscopy. I present results for the excited meson spectrum, with continuum quantum numbers of the states clearly delineated. I conclude with recent results for the low lying baryon spectrum, and the prospects for future calculations.

  13. Light $O^{++}$ Mesons: Scalargators in Florida

    OpenAIRE

    Pennington, M. R.

    2010-01-01

    Light scalar mesons abound in hadron processes, like the alligators in the Florida Everglades. Moreover, scalars are intimately tied to the vacuum structure of QCD. They are the product of many decays. Consequently, a rich source of recent information about them has come from experiments producing heavy flavour mesons. Indeed, scalars will continue to dominate many of the processes to be studied at forthcoming facilities like BESIII in Beijing, FAIR at GSI Darmstadt and the GlueX experiment a...

  14. Hidden Beauty: Using a Poem by Jayne Cortez.

    Science.gov (United States)

    Statman, Mark

    1998-01-01

    Reproduces a poem about an urban landscape by Jayne Cortez and reflects on how students are willing to tackle its complexities and its ideas about beauty. Finds that the poem is effective for a discussion of beauty among students. (PA)

  15. Parton distribution amplitudes of light vector mesons

    CERN Document Server

    Gao, Fei; Liu, Yu-Xin; Roberts, Craig D; Schmidt, Sebastian M

    2014-01-01

    A rainbow-ladder truncation of QCD's Dyson-Schwinger equations is used to calculate rho- and phi-meson valence-quark (twist-two parton) distribution amplitudes (PDAs) via a light-front projection of their Bethe-Salpeter wave functions, which possess S- and D-wave components of comparable size in the meson rest frame. All computed PDAs are broad concave functions, whose dilation with respect to the asymptotic distribution is an expression of dynamical chiral symmetry breaking. The PDAs can be used to define an ordering of valence-quark light-front spatial-extent within mesons: this size is smallest within the pion and increases through the perp-polarisation to the parallel-polarisation of the vector mesons; effects associated with the breaking of SU(3)-flavour symmetry are significantly smaller than those associated with altering the polarisation of vector mesons. Notably, the predicted pointwise behaviour of the rho-meson PDAs is in quantitative agreement with that inferred recently via an analysis of diffrac...

  16. Measurement of semi-electronic beauty-hadron decays via their impact parameter in pp collisions in ALICE

    International Nuclear Information System (INIS)

    The measurement of beauty-hadron decays via the detection of electron tracks that are displaced from the primary vertex can be performed with ALICE, whose capabilities of electron identification and tracking fulfil all requirements for this task. While the large corresponding branching ratios guarantee sufficient yields of beauty-decay electrons at LHC energies, the wide electron impact parameter distribution due to the long lifetime and the decay kinematics of beauty hadrons allows for a separation of electrons from beauty-hadron decays from background electrons on a statistical basis. This thesis presents the analysis of electrons from beauty-hadron decays in protonproton collisions at centre-of-mass energies of 7 TeV and 2.76 TeV. Using the ALICE central-barrel detectors ITS, TPC, and TOF, pT-differential electron spectra are measured at mid-rapidity (vertical stroke y vertical stroke <0.8) for transverse momenta between 1 and 8 GeV/c. Information from the TPC and TOF signal is combined to select pure electron samples, whose signal-to-background ratio is subsequently enhanced via the requirement of a minimal impact parameter of the tracks towards the primary vertex in the x - y plane. Tracks from photon conversions occurring outside the innermost ITS layer, which have a wide impact parameter distribution, are rejected via the requirement of hits in both SPD layers of the ITS. The remaining hadron contamination in the selected electron track samples is determined on a statistical basis from the distributions of their energy deposition per unit of length in the TPC. A crucial challenge of this analysis is the subtraction of the electron background originating from charm decays, photon conversions, and light-meson decays from the measured inclusive electron spectrum. The corresponding electron yields are determined using spectra from PYTHIA simulations that are reweighted based on previous measurements of charmed hadrons, π0, and η. Minor contributions from other

  17. Measurement of semi-electronic beauty-hadron decays via their impact parameter in pp collisions in ALICE

    Energy Technology Data Exchange (ETDEWEB)

    Heide, Markus Ansgar

    2014-03-19

    The measurement of beauty-hadron decays via the detection of electron tracks that are displaced from the primary vertex can be performed with ALICE, whose capabilities of electron identification and tracking fulfil all requirements for this task. While the large corresponding branching ratios guarantee sufficient yields of beauty-decay electrons at LHC energies, the wide electron impact parameter distribution due to the long lifetime and the decay kinematics of beauty hadrons allows for a separation of electrons from beauty-hadron decays from background electrons on a statistical basis. This thesis presents the analysis of electrons from beauty-hadron decays in protonproton collisions at centre-of-mass energies of 7 TeV and 2.76 TeV. Using the ALICE central-barrel detectors ITS, TPC, and TOF, p{sub T}-differential electron spectra are measured at mid-rapidity (vertical stroke y vertical stroke <0.8) for transverse momenta between 1 and 8 GeV/c. Information from the TPC and TOF signal is combined to select pure electron samples, whose signal-to-background ratio is subsequently enhanced via the requirement of a minimal impact parameter of the tracks towards the primary vertex in the x - y plane. Tracks from photon conversions occurring outside the innermost ITS layer, which have a wide impact parameter distribution, are rejected via the requirement of hits in both SPD layers of the ITS. The remaining hadron contamination in the selected electron track samples is determined on a statistical basis from the distributions of their energy deposition per unit of length in the TPC. A crucial challenge of this analysis is the subtraction of the electron background originating from charm decays, photon conversions, and light-meson decays from the measured inclusive electron spectrum. The corresponding electron yields are determined using spectra from PYTHIA simulations that are reweighted based on previous measurements of charmed hadrons, π{sup 0}, and η. Minor

  18. The evolutionary psychology of facial beauty.

    Science.gov (United States)

    Rhodes, Gillian

    2006-01-01

    What makes a face attractive and why do we have the preferences we do? Emergence of preferences early in development and cross-cultural agreement on attractiveness challenge a long-held view that our preferences reflect arbitrary standards of beauty set by cultures. Averageness, symmetry, and sexual dimorphism are good candidates for biologically based standards of beauty. A critical review and meta-analyses indicate that all three are attractive in both male and female faces and across cultures. Theorists have proposed that face preferences may be adaptations for mate choice because attractive traits signal important aspects of mate quality, such as health. Others have argued that they may simply be by-products of the way brains process information. Although often presented as alternatives, I argue that both kinds of selection pressures may have shaped our perceptions of facial beauty.

  19. Hadroproduction characteristics of charm and beauty

    International Nuclear Information System (INIS)

    In this article the authors review the present status of their knowledge on the hadroproduction characteristics of charm and beauty. During a brief description of the properties of all charm and beauty particles reportedly observed in hadron-hadron experiments they discuss the strengths and weaknesses of the various experimental techniques. In particular they emphasise the quantitative problems associated with nuclear target experiments and show the progress that is being made in understanding the A-dependence problem. Focussing on charm cross sections the authors see that the data are becoming sufficiently good to give us a reliable and coherent picture which provides a serious test of the QCD fusion model. This same fusion model is then used with existing beauty cross section determinations to make some extrapolations. Finally, a few remaining puzzles and curiosities are underlined

  20. On the Beautiful and the Ugly

    Directory of Open Access Journals (Sweden)

    Herman Parret

    2011-01-01

    Full Text Available Classical aesthetics sees the experience of the beautiful as an anthropological necessity. But, in fact, the beautiful is rather the central category designating classical art, and one can question the relevance of this category considering contemporary art. The reference term most frequently used for contemporary art is interesting: works of art solicit the interests of my faculties (the cognitive-intellectual, the pragmatic community-oriented moral, the affective aesthetic faculties. It is interesting to notice that the categories of the beautiful and the ugly have an axiological-moral value. It looks as if the qualities of contemporary art works are judged according to the intensity of the impact on the interests of our faculties. It reveals important, in this respect, to distinguish the ugly from the sublime and the monstrous. Kant’s Third Critique is of some importance in defining these categories.

  1. On the Beauty in Keats’s Ode to Autumn

    Institute of Scientific and Technical Information of China (English)

    谭凯

    2011-01-01

    Keats’s poems are famous for beauty,and Ode to Autumn is generally regarded as one of his most beautiful poems.In this ode,Keats presents a vivid picture of the harvesting autumn,in which many forms of beauty can be captured.The present paper attempts to conduct an analysis of the beauty in Keats’s Ode to Autumn,hopefully it could help readers better understand Keats and his works.

  2. Spectroscopy of mesonic molecules with heavy-light flavour mesons

    CERN Document Server

    Rathaud, D P

    2016-01-01

    In this work, we have calculated the mass spectra and decay properties of dimesonic (meson-antimeson) bound state in the variational scheme. The intermesonic interaction considered as the Hellmann potential and One Pion Exchange potential. The mass spectra of the $D\\bar{D^{*}}$, $D\\bar{D_{s}^{*}}$, $D_{s}\\bar{D^{*}}$, $D_{s}\\bar{D_{s}^{*}}$, $D^{*}\\bar{D^{*}}$, $D_{s}^{*}\\bar{D_{s}^{*}}$, $D\\bar{B^{*}}$, $D\\bar{B_{s}^{*}}$, $D_{s}\\bar{B^{*}}$, $D_{s}\\bar{B_{s}^{*}}$, $B^{*}\\bar{D}$,$B^{*}\\bar{D_{s}}$, $B\\bar{B^{*}}$, $B_{s}\\bar{B^{*}}$, $B_{c}\\bar{B^{*}}$, $B^{*}\\bar{B^{*}}$, $B^{*}\\bar{B_{s}^{*}}$, $B_{s}^{*}\\bar{B_{s}^{*}}$ etc.. are calculated. The states X(3872), $X_{2c}(4013)$ ,$Z_{b}(10610)/X_{b}$ and $Z_{b}(10650)/X_{b2}$ are compared with $D\\bar{D^{*}}$, $D^{*}\\bar{D^{*}}$, $B\\bar{B^{*}}$ and $B^{*}\\bar{B^{*}}$ dimesonic bound states. To probe the molecular structure of the compared states, we have calculated the decay properties sensitive to their long and short distance structure of hadorinc molecul...

  3. Probing flavor and CP in decays of beauty and charm

    Energy Technology Data Exchange (ETDEWEB)

    Schacht, Stefan

    2013-07-10

    In order to probe for new physics beyond the Standard Model of particle physics, we explore decays of beauty and charm mesons. In the b sector we find ourselves in the realm of precision physics so that we can improve significantly the bounds on supersymmetric flavor violation from new theoretical and experimental progress in anti B → anti K{sup (*)}l{sup +}l{sup -}. From these bounds we derive several phenomenological implications, as bounds on Radiative Flavor Violation models that are partly even sharper than the ones from Kaon physics. In order to improve the bounds on new physics models from anti B → anti K{sup (*)}l{sup +}l{sup -} even more in the future, we extract subsequently anti B → anti K{sup *} form factor ratios from data at high invariant lepton pair masses. These are the current bottleneck for the advancement in precision. In the charm sector unexpectedly large CP violation was measured recently. Currently, the experimental situation is unsettled. We work here on the main problem that one cannot reliably calculate the hadronic part from first principles, i.e., cannot exclude possible enhancements from this source. We perform for the first time a comprehensive SU(3){sub F} analysis of D → P{sub 8}P{sub 8} decays including linear breaking in full generality. We find the SU(3){sub F} expansion to be indeed working. Furthermore, the fit shows a large triplet matrix element enhancement that cannot be excluded for sure without having a dynamical theory at hand. We show as a proof of principle that with significantly improved data we could disentangle the triplet model including the Standard Model from other new physics models. Using reasonable theoretical input from QCD factorization we can eliminate some of the many degrees of freedom of the pure SU(3){sub F} analysis. This can sharpen partially the correlation between D-decay CP asymmetries and branching ratios.

  4. Probing flavor and CP in decays of beauty and charm

    International Nuclear Information System (INIS)

    In order to probe for new physics beyond the Standard Model of particle physics, we explore decays of beauty and charm mesons. In the b sector we find ourselves in the realm of precision physics so that we can improve significantly the bounds on supersymmetric flavor violation from new theoretical and experimental progress in anti B → anti K(*)l+l-. From these bounds we derive several phenomenological implications, as bounds on Radiative Flavor Violation models that are partly even sharper than the ones from Kaon physics. In order to improve the bounds on new physics models from anti B → anti K(*)l+l- even more in the future, we extract subsequently anti B → anti K* form factor ratios from data at high invariant lepton pair masses. These are the current bottleneck for the advancement in precision. In the charm sector unexpectedly large CP violation was measured recently. Currently, the experimental situation is unsettled. We work here on the main problem that one cannot reliably calculate the hadronic part from first principles, i.e., cannot exclude possible enhancements from this source. We perform for the first time a comprehensive SU(3)F analysis of D → P8P8 decays including linear breaking in full generality. We find the SU(3)F expansion to be indeed working. Furthermore, the fit shows a large triplet matrix element enhancement that cannot be excluded for sure without having a dynamical theory at hand. We show as a proof of principle that with significantly improved data we could disentangle the triplet model including the Standard Model from other new physics models. Using reasonable theoretical input from QCD factorization we can eliminate some of the many degrees of freedom of the pure SU(3)F analysis. This can sharpen partially the correlation between D-decay CP asymmetries and branching ratios.

  5. Fixed Target Beauty Physics Experimental Programs

    International Nuclear Information System (INIS)

    The current and near term future fixed target physics efforts in observing particles with open beauty are reviewed. This includes a compilation of the non-observation upper limits and the observation of both upsilon and b-states. A short discussion of the theoretical predictions for the hadro-produced beauty pairs is included. The major part of this review is devoted to the techniques and tricks employed, a survey of the current and proposed experiments. A personal summary of the experimental prospects concludes this report. 28 refs., 26 figs

  6. Beautiful skin%美丽肌肤

    Institute of Scientific and Technical Information of China (English)

    胡敏

    2012-01-01

    介绍了皮肤皱纹生成的机理,抗皱有效成分、作用机理以及皮肤的抗衰老护理。介绍了一些美容食品、抗老化美容成分以及最具潜力的原料来源。%The mechanism of skin wrinkle formation,the active ingredients of anti-aging,the mechanism of action as well as skin anti-aging care were introduced here.Some beautiful foods,anti-aging beautiful ingredients and the most interesting source of feed were also related.

  7. Walking in Beauty: An American Indian Perspective on Social Justice

    Science.gov (United States)

    Eason, Evan Allen; Robbins, Rockey

    2012-01-01

    The purpose of this article is to introduce "walking in beauty," an American Indian spiritual perspective related to social justice that emphasizes beauty, harmony, connectedness/unity of experience, and imagination. Walking in beauty includes 3 processes: embodiment, creativity, and appreciation of the sublime. Recommendations are offered for…

  8. 75 FR 33763 - Beauty and Cosmetics Trade Mission to India

    Science.gov (United States)

    2010-06-15

    ... International Trade Administration Beauty and Cosmetics Trade Mission to India AGENCY: International Trade... Beauty and Cosmetics Trade Mission to India (New Delhi, Mumbai and Bangalore), November 15-19, 2010. Led.... The cosmetics/beauty industry is one of the booming retail sectors in India with very strong...

  9. 75 FR 21595 - Beauty and Cosmetics Trade Mission to India

    Science.gov (United States)

    2010-04-26

    ... International Trade Administration Beauty and Cosmetics Trade Mission to India AGENCY: International Trade... Beauty and Cosmetics Trade Mission to India (New Delhi, Mumbai and Bangalore), November 15-19, 2010. Led... Indian market. The cosmetics/ beauty industry is one of the booming retail sectors in India with...

  10. Simple estimates of the masses of pentaquarks with hidden beauty or strangeness

    Science.gov (United States)

    Kopeliovich, Vladimir; Potashnikova, Irina

    2016-04-01

    The masses of cryptoexotic pentaquarks with hidden beauty are estimated phenomenologically using the results by the LHCb Collaboration which discovered recently the cryptoexotic pentaquarks with hidden charm. The expected masses of the hidden beauty pentaquarks are about 10.8 GeV and 10.7 GeV in the limit of some kind of heavy quark symmetry. The states with hidden strangeness considered in a similar way have masses of about 2.37 GeV and 2.30 GeV, several hundred MeV higher than states discussed previously in connection with the relatively light positive strangeness pentaquark θ+. Empirical data on the spectra of pentaquarks can be used to get information about quarkonia interaction with nucleons. The results obtained for the case of heavy flavors are in fair agreement with the model of isospin (pion) exchange between flavored baryons and antiflavored vector mesons proposed by Karliner and Rosner, and in qualitative agreement with the bound-state version of the chiral soliton model.

  11. Explosions in Majestic Spiral Beauties

    Science.gov (United States)

    2004-12-01

    Images of beautiful galaxies, and in particular of spiral brethren of our own Milky Way, leaves no-one unmoved. It is difficult indeed to resist the charm of these impressive grand structures. Astronomers at Paranal Observatory used the versatile VIMOS instrument on the Very Large Telescope to photograph two magnificent examples of such "island universes", both of which are seen in a southern constellation with an animal name. But more significantly, both galaxies harboured a particular type of supernova, the explosion of a massive star during a late and fatal evolutionary stage. The first image (PR Photo 33a/04) is of the impressive spiral galaxy NGC 6118 [1], located near the celestial equator, in the constellation Serpens (The Snake). It is a comparatively faint object of 13th magnitude with a rather low surface brightness, making it pretty hard to see in small telescopes. This shyness has prompted amateur astronomers to nickname NGC 6118 the "Blinking Galaxy" as it would appear to flick into existence when viewed through their telescopes in a certain orientation, and then suddenly disappear again as the eye position shifted. There is of course no such problem for the VLT's enormous light-collecting power and ability to produce sharp images, and this magnificent galaxy is here seen in unequalled detail. The colour photo is based on a series of exposures behind different optical filters, obtained with the VIMOS multi-mode instrument on the 8.2-m VLT Melipal telescope during several nights around August 21, 2004. About 80 million light-years away, NGC 6118 is a grand-design spiral seen at an angle, with a very small central bar and several rather tightly wound spiral arms (it is classified as of type "SA(s)cd" [2]) in which large numbers of bright bluish knots are visible. Most of them are active star-forming regions and in some, very luminous and young stars can be perceived. Of particular interest is the comparatively bright stellar-like object situated directly

  12. Excitations of single-beauty hadrons

    OpenAIRE

    Burch, Tommy; Hagen, Christian; Lang, Christian B.; Limmer, Markus; Schäfer, Andreas

    2008-01-01

    In this work we study the predominantly orbital and radial excitations of hadrons containing a single heavy quark. We present meson and baryon mass splittings and ratios of meson decay constants (e.g., $f_{B_s}/f_B$ and $f_{B_s'}/f_{B_s}$) resulting from quenched and dynamical two-flavor configurations. Light quarks are simulated using the chirally improved (CI) lattice Dirac operator at valence masses as light as $M_\\pi \\approx 350$ MeV. The heavy quark is approximated by a static propagator...

  13. Photoproduction and Decay of Light Mesons in CLAS

    Energy Technology Data Exchange (ETDEWEB)

    Amaryan, Moskov Jamalovich [Old Dominion University

    2013-08-01

    We present preliminary experimental results on photoproduction and decay of light mesons measured with CLAS setup at JLAB . This include Dalitz decay of pseudoscalar and vector mesons, radiative decay of pseudoscalar mesons as well hadronic decays of pseudoscalar and vector mesons. The collected high statistics in some of decay channels exceeds the world data by an order of magnitude and some other decay modes are observed for the first time. It is shown how the CLAS data will improve the world data on transition form factors of light mesons, Dalitz plot analyses, branching ratios of rare decay modes and other fundamental properties potentially accessible through the light meson decays.

  14. Quarkonium Contribution to Meson Molecules

    CERN Document Server

    Cincioglu, E; Ozpineci, A; Yilmazer, A U

    2016-01-01

    Starting from a molecular picture for the X(3872) resonance, this state and its J^{PC}=2++ HQSS partner [X2(4012)] are analyzed within a model which incorporates possible mixings with 2P charmonium states. Since it is reasonable to expect the bare chi_{c1}(2P) to be located above the D\\bar D* threshold, but relatively close to it, the presence of the charmonium state provides an effective attraction that will contribute to bind the X(3872), but it will not appear in the 2++ sector. Indeed in this latter sector, the chi_{c2}(2P) should provide an effective small repulsion, because it is placed well below the D*\\bar D* threshold. We show how the 1++ and 2++ bare charmonium poles are modified due to the D(*)\\bar D(*) loop effects, and the first one is moved to the complex plane. The meson loops produce, besides some shifts in the masses of the charmonia, a finite width for the 1++ dressed charmonium state. On the other hand, the X(3872) and X2(4012) start developing some charmonium content, which is estimated by...

  15. Oscillazioni del mesone D^0

    CERN Document Server

    Schiraldi, Vito; Morello, Michael Joseph

    In fisica delle particelle, con il termine di "oscillazione" si indica la trasformazione di una particella neutra nella sua antiparticella e viceversa, fenomeno dovuto al fatto che gli autostati di flavor non sono autostati della matrice di massa. Il Modello Standard delle interazioni fondamentali predice che l'oscillazione del mesone D^0 avvenga su tempi molto maggiori di una vita media, e appaia perciò come un effetto piccolo, inferiore al percento, in contrasto con il caso dei mesoni B^0 e B^0_s che oscillano con molta maggiore rapidità. Sperimentalmente, l'oscillazione dei mesoni D^0 è rimasta inosservata fino a tempi recenti: la prima evidenza sperimentale dell'esistenza di un effetto di oscillazione è stata ottenuta soltanto nella primavera del 2007 dagli esperimenti BaBar (SLAC, USA) e Belle (KEKB, Japan). Nell'agosto 2007 anche l’esperimento CDF (Fermilab, USA) ha presentato una evidenza simile, basata sull'analisi di una parte del campione di dati disponibile. La tesi descrive gli aspetti speri...

  16. Beauty Clinic Services and Using of Cosmetic for Beauty Clinic Attendees at Jakarta, Indonesia

    OpenAIRE

    raharni budiarto

    2014-01-01

    Cosmetic is one of pharmaceuticals preparation, with the vigorous cosmetic advertising in print media, electronic media or internet, communities are faced with cosmetics advertising, in which mostly are offering for skin care, especially women to get the skin whiter and brighter. Cosmetic advertising based on Ministry of Health regulation no. 386/Menkes/SK/1994. The objective of this study was to know the beauty clinic services and using of cosmetic for beauty clinic attendees and affecting f...

  17. Beauty and Brains: Detecting Anomalous Pattern Co-Occurrences

    OpenAIRE

    Bertens, Roel; Vreeken, Jilles; Siebes, Arno

    2015-01-01

    Our world is filled with both beautiful and brainy people, but how often does a Nobel Prize winner also wins a beauty pageant? Let us assume that someone who is both very beautiful and very smart is more rare than what we would expect from the combination of the number of beautiful and brainy people. Of course there will still always be some individuals that defy this stereotype; these beautiful brainy people are exactly the class of anomaly we focus on in this paper. They do not posses intri...

  18. Beauty as Fit: A Metaphor in Mathematics?

    Science.gov (United States)

    Raman, Manya; Öhman, Lars-Daniel

    2013-01-01

    Beauty, which plays a central role in the practice of mathematics (Sinclair 2002), is almost absent in discussions of school mathematics (Dreyfus and Eisenberg 1986). This is problematic, because students will decide whether or not to continue their studies in mathematics without having an accurate picture of what the subject is about. In order to…

  19. The Beautiful Physics of LHC Run 2

    CERN Document Server

    AUTHOR|(CDS)2108556

    2015-01-01

    Run 2 of the LHC offers some beautiful prospects for new physics, including flavour physics as well as more detailed studies of the Higgs boson and searches for new physics beyond the Standard Model (BSM). One of the possibilities for BSM physics is supersymmetry, and flavour physics plays various important r\\^oles in constraining supersymmetric models.

  20. Open Charm and Beauty Production at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Behnke, Olaf [DESY, Notkestrasse 85, 22607 Hamburg (Germany)

    2012-01-15

    A review is provided of open charm and beauty production at HERA and its description by perturbative QCD (pQCD). Four years after the end of the data taking there is still a steady flow of new charm and beauty results from HERA. Among the results reported here are the first combined H1 and ZEUS measurements on the contribution from charm production to deep inelastic scattering (DIS), represented by the structure function F{sub 2}{sup cc{sup {sup M{sup a{sup c{sup r{sup o{sup n{sup }}}}}}}}}, as well as new precise results on the corresponding structure function for beauty production, F{sub 2}{sup bb{sup {sup M{sup a{sup c{sup r{sup o{sup n{sup }}}}}}}}}. Furthermore the situation of charm and beauty production in the photoproduction kinematic regime is reviewed. Since it is a related field also the first hadroproduction results from LHC are presented. A brief outlook is given on open heavy flavour prospects at possible future ep colliders, with a focus on the LHeC.

  1. Rare beauty and charm decays at LHCb

    CERN Document Server

    Puig Navarro, A

    2013-01-01

    Flavour changing neutral current decays of heavy flavoured hadrons are suppressed in the Standard Model and can be used to search for new physics contributions. We report a summary of the latest results from the LHCb collaboration on rare decays of beauty and charm hadrons.

  2. Rare Beauty and Charm Decays at LHCb

    CERN Document Server

    Puig, Albert

    2013-01-01

    Flavour changing neutral current decays of heavy flavoured hadrons are suppressed in the Standard Model and can be used to search for new physics contributions. We report a summary of the latest results from the LHCb collaboration on rare decays of beauty and charm hadrons.

  3. Mathematicians in Schools: Uncovering Maths' Beautiful Secrets

    Science.gov (United States)

    Welch, Bronwyn

    2016-01-01

    Mathematics professionals are working with teachers revealing the reality and beauty that happens in the world of math and to show that this is essentially a "human endeavour," embedded in much of what people do and the ways in which they think. In this article, the author shares vignettes of primary classes working with mathematicians…

  4. Poplus Diversifolia:The Most Beautiful Tree

    Institute of Scientific and Technical Information of China (English)

    ZhanHua

    2004-01-01

    Populus diversifolia,an old and rare tree species,is an only tree variety that can naturally grow into forest in Xinjiang's deserts.It is called "Tokolako"in the Uigur language,meaning"the most beautiful tree".Its extraordinary resistance to drought,sand wind and sanitization enables it to thrive in deserts and gains it repute

  5. [Study of hyperons and beauty particles

    International Nuclear Information System (INIS)

    The proposed research program is to study the production and decay properties of the hyperons and the beauty hadrons at Fermilab. Since the project was approved in 1989, a lot of progress has been made. This report is a summary of the achievements

  6. Beauty baryon decays: a theoretical overview

    International Nuclear Information System (INIS)

    I overview the theoretical status and recent progress on the calculations of beauty baryon decays focusing on the QCD aspects of the exclusive semi-leptonic Λb → pℓμ decay at large recoil and theoretical challenges of radiative and electro-weak penguin decays Λb → Λγ,Λℓ+ℓ−

  7. Why Beautiful People Are More Intelligent

    Science.gov (United States)

    Kanazawa, Satoshi; Kovar, Jody L.

    2004-01-01

    Empirical studies demonstrate that individuals perceive physically attractive others to be more intelligent than physically unattractive others. While most researchers dismiss this perception as a ''bias'' or ''stereotype,'' we contend that individuals have this perception because beautiful people indeed "are" more intelligent. The conclusion that…

  8. Beautiful Minds—For How Long.

    Directory of Open Access Journals (Sweden)

    Lori Marino

    2008-07-01

    Full Text Available Lori Marino reviews the new bookBeautiful Minds, which investigates the "parallel lives" of primates and cetaceans and argues that despite the evolutionary distance of these large-brained mammals, they nevertheless share a capacity for complex communication and social behavior, representing a striking example of convergence in intelligence.

  9. The Beautiful Physics of LHC Run 2

    OpenAIRE

    Ellis, John

    2014-01-01

    Run 2 of the LHC offers some beautiful prospects for new physics, including flavour physics as well as more detailed studies of the Higgs boson and searches for new physics beyond the Standard Model (BSM). One of the possibilities for BSM physics is supersymmetry, and flavour physics plays various important r\\^oles in constraining supersymmetric models.

  10. Beautiful mass predictions from scalar lattice QCD

    Energy Technology Data Exchange (ETDEWEB)

    Samuel, S.; Moriarty, K.J.M.

    1986-07-31

    Scalar lattice QCD methods are used to accurately predict the masses of hadrons with beauty, that is, states which contain a b quark. These states have not yet been seen in the laboratory. The accuracy of the predictions (approx.=25 MeV) make the calculation a good test of lattice methods as well as providing useful guidance for experimentalists.

  11. Beautiful Minds—For How Long

    OpenAIRE

    Lori Marino

    2008-01-01

    Lori Marino reviews the new bookBeautiful Minds, which investigates the "parallel lives" of primates and cetaceans and argues that despite the evolutionary distance of these large-brained mammals, they nevertheless share a capacity for complex communication and social behavior, representing a striking example of convergence in intelligence.

  12. Miss International Beauty Pageant in China

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ The 47th Miss International Beauty Pageant, jointly sponsored by China Youth Concern Committee for the Advancement of Health and Physical Culture Development, International Culture Association, Kessles Paris, International Culture Exchange Organization,and co-organized by Beijing Kessles International Culture Media Co., Ltd., will be held in Beijing, China, according to the press conference on March 21.

  13. Meson spectroscopy in the light quark sector

    International Nuclear Information System (INIS)

    Understanding the hadron spectrum is one of the fundamental issues in modern particle physics. We know that existing hadron configurations include baryons, made of three quarks, and mesons, made of quark-antiquark pairs. However most of the mass of the hadrons is not due to the mass of these elementary constituents but to their binding force. Studying the hadron spectrum is therefore a tool to understand one of the fundamental forces in nature, the strong force, and Quantum Chromo Dynamics (QCD), the theory that describes it. This investigation can provide an answer to fundamental questions as what is the origin of the mass of hadrons, what is the origin of quark confinement, what are the relevant degrees of freedom to describe these complex systems and how the transition between the elementary constituents, quarks and gluons, and baryons and mesons occurs. In this field a key tool is given by meson spectroscopy. Mesons, being made by a quark and an anti-quark, are the simplest quark bound system and therefore the ideal benchmark to study the interaction between quarks and understand what the role of gluons is. In this investigation, it is fundamental to precisely determine the spectrum and properties of mesons but also to search for possible unconventional states beyond the qq-bar configuration as tetra-quarks (qq q-bar q-bar), hybrids (qq-bar g) and glueballs. These states can be distinguished unambiguously from regular mesons when they have exotic quantum numbers, i.e. combinations of total angular momentum, spin and parity that are not allowed for qq-bar states. These are called exotic quantum numbers and the corresponding states are referred to as exotics. The study of the meson spectrum and the search for exotics is among the goals of several experiments in the world that exploit different reaction processes, as e+e- annihilation, pp-bar annihilation, pion scattering, proton-proton scattering and photo-production, to produce meson states. This intense effort

  14. Bottom-strange mesons in hyperonic matter

    CERN Document Server

    Pathak, Divakar

    2014-01-01

    The in-medium behavior of bottom-strange pseudoscalar mesons in hot, isospin asymmetric and dense hadronic environment is studied using a chiral effective model. The same was recently generalized to the heavy quark sector and employed to study the behavior of open-charm and open-bottom mesons. The heavy quark (anti-quark) is treated as frozen and all medium modifications of these bottom-strange mesons are due to their strange anti-quark (quark) content. We observe a pronounced dependence of their medium mass on baryonic density and strangeness content of the medium. Certain aspects of these in-medium interactions are similar to those observed for the strange-charmed mesons in a preceding investigation, such as the lifting of mass-degeneracy of $B_S^0$ and ${\\bar B}_S^0$ mesons in hyperonic matter, while the same is respected in vacuum as well as in nuclear matter. In general, however, there is a remarkable distinction between the two species, even though the formalism predicts a completely analogous in-medium...

  15. Light Vector Mesons in the Nuclear Medium

    CERN Document Server

    Wood, M H; Weygand, D P; Djalali, C; Tur, C; Mosel, U; Mühlich, P; Adams, G; Amaryan, M J; Ambrozewicz, P; Anghinolfi, M; Asryan, G; Avakian, H; Bagdasaryan, H; Baillie, N; Ball, J P; Baltzell, N A; Barrow, S; Battaglieri, M; Bedlinskiy, I; Bektasoglu, M; Bellis, M; Benmouna, N; Berman, B L; Biselli, A S; Blaszczyk, L; Bouchigny, S; Boiarinov, S; Bradford, R; Branford, D; Briscoe, W J; Brooks, W K; Burkert, V D; Butuceanu, C; Calarco, J R; Careccia, S L; Carman, D S; Carnahan, B; Casey, L; Chen, S; Cheng, L; Cole, P L; Collins, P; Coltharp, P; Crabb, D; Crannell, H; Credé, V; Cummings, J P; Dashyan, N; De Vita, R; De Sanctis, E; Degtyarenko, P V; Denizli, H; Dennis, L; Deur, A; Dharmawardane, K V; Dickson, R; Dodge, G E; Doughty, D; Dugger, M; Dytman, S; Dzyubak, O P; Egiyan, H; Egiyan, K S; El Fassi, L; Elouadrhiri, L; Eugenio, P; Fedotov, G; Feldman, G; Feuerbach, R J; Fradi, A; Funsten, H; Garçon, M; Gavalian, G; Gilfoyle, G P; Giovanetti, K L; Girod, F X; Goetz, J T; Gordon, C I O; Gothe, R W; Griffioen, K A; Guidal, M; Guler, N; Guo, L; Gyurjyan, V; Hadjidakis, C; Hafidi, K; Hakobyan, H; Hakobyan, R S; Hanretty, C; Hardie, J; Hassall, N; Hersman, F W; Hicks, K; Hleiqawi, I; Holtrop, M; Hyde-Wright, C E; Ilieva, Y; Ireland, D G; Ishkhanov, B S; Isupov, E L; Ito, M M; Jenkins, D; Jo, H S; Johnstone, J R; Joo, K; Jüngst, H G; Kalantarians, N; Kellie, J D; Khandaker, M; Khetarpal, P; Kim, W; Klein, A; Klein, F J; Klimenko, A V; Kossov, M; Krahn, Z; Kramer, L H; Kubarovski, V; Kühn, J; Kuhn, S E; Kuleshov, S V; Lachniet, J; Laget, J M; Langheinrich, J; Lawrence, D; Ji, Li; Livingston, K; Lu, H Y; MacCormick, M; Markov, N; Mattione, P; McAleer, S; McKinnon, B; McNabb, J W C; Mecking, B A; Mehrabyan, S; Melone, J J; Mestayer, M D; Meyer, C A; Mibe, T; Mikhailov, K; Minehart, R; Mirazita, M; Miskimen, R; Mokeev, V; Moriya, K; Morrow, S A; Moteabbed, M; Müller, J; Munevar, E; Mutchler, G S; Nadel-Turonski, P; Niccolai, S; Niculescu, G; Niculescu, I; Niczyporuk, B B; Niroula, M R; Niyazov, R A; Nozar, M; Osipenko, M; Ostrovidov, A I; Park, K; Pasyuk, E; Paterson, C; Anefalos Pereira, S; Pierce, J; Pivnyuk, N; Pocanic, D; Pogorelko, O; Pozdniakov, S; Preedom, B M; Price, J W; Prok, Y; Protopopescu, D; Raue, B A; Riccardi, G; Ricco, G; Ripani, M; Ritchie, B G; Ronchetti, F; Rosner, G; Rossi, P; Sabati, F; Salamanca, J; Salgado, C; Santoro, J P; Sapunenko, V; Schumacher, R A; Serov, V S; Sharabyan, Yu G; Sharov, D; Shvedunov, N V; Smith, E S; Smith, L C; Sober, D I; Sokhan, D; Stavinsky, A; Stepanyan, S; Stepanyan, S S; Stokes, B E; Stoler, P; Strakovsky, I I; Strauch, S; Taiuti, M; Tedeschi, D J; Tkabladze, A; Tkachenko, S; Todor, L; Ungaro, M; Vineyard, M F; Vlassov, A V; Watts, D P; Weinstein, L B; Williams, M; Wolin, E; Yegneswaran, A; Zana, L; Zhang, B; Zhang, J; Zhao, B; Zhao, Z W

    2008-01-01

    The light vector mesons ($\\rho$, $\\omega$, and $\\phi$) were produced in deuterium, carbon, titanium, and iron targets in a search for possible in-medium modifications to the properties of the $\\rho$ meson at normal nuclear densities and zero temperature. The vector mesons were detected with the CEBAF Large Acceptance Spectrometer (CLAS) via their decays to $e^{+}e^{-}$. The rare leptonic decay was chosen to reduce final-state interactions. A combinatorial background was subtracted from the invariant mass spectra using a well-established event-mixing technique. The $\\rho$ meson mass spectrum was extracted after the $\\omega$ and $\\phi$ signals were removed in a nearly model-independent way. Comparisons were made between the $\\rho$ mass spectra from the heavy targets ($A > 2$) with the mass spectrum extracted from the deuterium target. With respect to the $\\rho$-meson mass, we obtain a small shift compatible with zero. Also, we measure widths consistent with standard nuclear many-body effects such as collisional...

  16. Rare meson decays into very light neutralinos

    Energy Technology Data Exchange (ETDEWEB)

    Dreiner, H.K.; Grab, S. [Bonn Univ. (Germany). Bethe Center for Theoretical Physics und Physikalisches Inst.; Koschade, D. [RWTH Aachen Univ. (Germany). Inst. fuer Theoretische Physik; London Univ. (United Kingdom). Centre for Reserach in String Theory; Kraemer, M.; O' Leary, B. [RWTH Aachen Univ. (Germany). Inst. fuer Theoretische Physik; Langenfeld, U. [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany)

    2009-05-15

    We investigate the bounds on the mass of the lightest neutralino from rare meson decays within the MSSM with and without minimal flavor violation. We present explicit formulae for the two-body decays of mesons into light neutralinos and perform the first complete calculation of the loop-induced decays of kaons to pions and light neutralinos and B mesons to kaons and light neutralinos. We find that the supersymmetric branching ratios are strongly suppressed within the MSSM with minimal flavor violation, and that no bounds on the neutralino mass can be inferred from experimental data, i.e. a massless neutralino is allowed. The branching ratios for kaon and B meson decays into light neutralinos may, however, be enhanced when one allows for non-minimal flavor violation. We find new constraints on the MSSM parameter space for such scenarios and discuss prospects for future kaon and B meson experiments. Finally, we comment on the search for light neutralinos in monojet signatures at the Tevatron and at the LHC. (orig.)

  17. Rare meson decays into very light neutralinos

    International Nuclear Information System (INIS)

    We investigate the bounds on the mass of the lightest neutralino from rare meson decays within the MSSM with and without minimal flavor violation. We present explicit formulae for the two-body decays of mesons into light neutralinos and perform the first complete calculation of the loop-induced decays of kaons to pions and light neutralinos and B mesons to kaons and light neutralinos. We find that the supersymmetric branching ratios are strongly suppressed within the MSSM with minimal flavor violation, and that no bounds on the neutralino mass can be inferred from experimental data, i.e. a massless neutralino is allowed. The branching ratios for kaon and B meson decays into light neutralinos may, however, be enhanced when one allows for non-minimal flavor violation. We find new constraints on the MSSM parameter space for such scenarios and discuss prospects for future kaon and B meson experiments. Finally, we comment on the search for light neutralinos in monojet signatures at the Tevatron and at the LHC. (orig.)

  18. Natural Tendency towards Beauty in Humans: Evidence from Binocular Rivalry.

    Directory of Open Access Journals (Sweden)

    Ce Mo

    Full Text Available Although human preference for beauty is common and compelling in daily life, it remains unknown whether such preference is essentially subserved by social cognitive demands or natural tendency towards beauty encoded in the human mind intrinsically. Here we demonstrate experimentally that humans automatically exhibit preference for visual and moral beauty without explicit cognitive efforts. Using a binocular rivalry paradigm, we identified enhanced gender-independent perceptual dominance for physically attractive persons, and the results suggested universal preference for visual beauty based on perceivable forms. Moreover, we also identified perceptual dominance enhancement for characters associated with virtuous descriptions after controlling for facial attractiveness and vigilance-related attention effects, which suggested a similar implicit preference for moral beauty conveyed in prosocial behaviours. Our findings show that behavioural preference for beauty is driven by an inherent natural tendency towards beauty in humans rather than explicit social cognitive processes.

  19. Natural Tendency towards Beauty in Humans: Evidence from Binocular Rivalry.

    Science.gov (United States)

    Mo, Ce; Xia, Tiansheng; Qin, Kaixin; Mo, Lei

    2016-01-01

    Although human preference for beauty is common and compelling in daily life, it remains unknown whether such preference is essentially subserved by social cognitive demands or natural tendency towards beauty encoded in the human mind intrinsically. Here we demonstrate experimentally that humans automatically exhibit preference for visual and moral beauty without explicit cognitive efforts. Using a binocular rivalry paradigm, we identified enhanced gender-independent perceptual dominance for physically attractive persons, and the results suggested universal preference for visual beauty based on perceivable forms. Moreover, we also identified perceptual dominance enhancement for characters associated with virtuous descriptions after controlling for facial attractiveness and vigilance-related attention effects, which suggested a similar implicit preference for moral beauty conveyed in prosocial behaviours. Our findings show that behavioural preference for beauty is driven by an inherent natural tendency towards beauty in humans rather than explicit social cognitive processes.

  20. Natural Tendency towards Beauty in Humans: Evidence from Binocular Rivalry.

    Science.gov (United States)

    Mo, Ce; Xia, Tiansheng; Qin, Kaixin; Mo, Lei

    2016-01-01

    Although human preference for beauty is common and compelling in daily life, it remains unknown whether such preference is essentially subserved by social cognitive demands or natural tendency towards beauty encoded in the human mind intrinsically. Here we demonstrate experimentally that humans automatically exhibit preference for visual and moral beauty without explicit cognitive efforts. Using a binocular rivalry paradigm, we identified enhanced gender-independent perceptual dominance for physically attractive persons, and the results suggested universal preference for visual beauty based on perceivable forms. Moreover, we also identified perceptual dominance enhancement for characters associated with virtuous descriptions after controlling for facial attractiveness and vigilance-related attention effects, which suggested a similar implicit preference for moral beauty conveyed in prosocial behaviours. Our findings show that behavioural preference for beauty is driven by an inherent natural tendency towards beauty in humans rather than explicit social cognitive processes. PMID:26930202

  1. Natural Tendency towards Beauty in Humans: Evidence from Binocular Rivalry

    Science.gov (United States)

    Mo, Lei

    2016-01-01

    Although human preference for beauty is common and compelling in daily life, it remains unknown whether such preference is essentially subserved by social cognitive demands or natural tendency towards beauty encoded in the human mind intrinsically. Here we demonstrate experimentally that humans automatically exhibit preference for visual and moral beauty without explicit cognitive efforts. Using a binocular rivalry paradigm, we identified enhanced gender-independent perceptual dominance for physically attractive persons, and the results suggested universal preference for visual beauty based on perceivable forms. Moreover, we also identified perceptual dominance enhancement for characters associated with virtuous descriptions after controlling for facial attractiveness and vigilance-related attention effects, which suggested a similar implicit preference for moral beauty conveyed in prosocial behaviours. Our findings show that behavioural preference for beauty is driven by an inherent natural tendency towards beauty in humans rather than explicit social cognitive processes. PMID:26930202

  2. B meson decays to charmless meson pairs containing η or η' mesons

    Science.gov (United States)

    Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tackmann, K.; Tanabe, T.; Hawkes, C. M.; Soni, N.; Watson, A. T.; Koch, H.; Schroeder, T.; Asgeirsson, D. J.; Fulsom, B. G.; Hearty, C.; Mattison, T. S.; McKenna, J. A.; Barrett, M.; Khan, A.; Randle-Conde, A.; Blinov, V. E.; Bukin, A. D.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.; Bondioli, M.; Curry, S.; Eschrich, I.; Kirkby, D.; Lankford, A. J.; Lund, P.; Mandelkern, M.; Martin, E. C.; Stoker, D. P.; Atmacan, H.; Gary, J. W.; Liu, F.; Long, O.; Vitug, G. M.; Yasin, Z.; Sharma, V.; Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Mazur, M. A.; Richman, J. D.; Beck, T. W.; Eisner, A. M.; Heusch, C. A.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schalk, T.; Schumm, B. A.; Seiden, A.; Wang, L.; Winstrom, L. O.; Cheng, C. H.; Doll, D. A.; Echenard, B.; Fang, F.; Hitlin, D. G.; Narsky, I.; Ongmongkolkul, P.; Piatenko, T.; Porter, F. C.; Andreassen, R.; Mancinelli, G.; Meadows, B. T.; Mishra, K.; Sokoloff, M. D.; Bloom, P. C.; Ford, W. T.; Gaz, A.; Hirschauer, J. F.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Wagner, S. R.; Ayad, R.; Toki, W. H.; Wilson, R. J.; Feltresi, E.; Hauke, A.; Jasper, H.; Karbach, T. M.; Merkel, J.; Petzold, A.; Spaan, B.; Wacker, K.; Kobel, M. J.; Nogowski, R.; Schubert, K. R.; Schwierz, R.; Bernard, D.; Latour, E.; Verderi, M.; Clark, P. J.; Playfer, S.; Watson, J. E.; Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Fioravanti, E.; Franchini, P.; Luppi, E.; Munerato, M.; Negrini, M.; Petrella, A.; Piemontese, L.; Santoro, V.; Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Pacetti, S.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Tosi, S.; Chaisanguanthum, K. S.; Morii, M.; Adametz, A.; Marks, J.; Schenk, S.; Uwer, U.; Bernlochner, F. U.; Klose, V.; Lacker, H. M.; Lueck, T.; Volk, A.; Bard, D. J.; Dauncey, P. D.; Tibbetts, M.; Behera, P. K.; Charles, M. J.; Mallik, U.; Cochran, J.; Crawley, H. B.; Dong, L.; Eyges, V.; Meyer, W. T.; Prell, S.; Rosenberg, E. I.; Rubin, A. E.; Gao, Y. Y.; Gritsan, A. V.; Guo, Z. J.; Arnaud, N.; Béquilleux, J.; D'Orazio, A.; Davier, M.; Derkach, D.; da Costa, J. Firmino; Grosdidier, G.; Le Diberder, F.; Lepeltier, V.; Lutz, A. M.; Malaescu, B.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.; Lange, D. J.; Wright, D. M.; Bingham, I.; Burke, J. P.; Chavez, C. A.; Fry, J. R.; Gabathuler, E.; Gamet, R.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Clarke, C. K.; di Lodovico, F.; Sacco, R.; Sigamani, M.; Cowan, G.; Paramesvaran, S.; Wren, A. C.; Brown, D. N.; Davis, C. L.; Denig, A. G.; Fritsch, M.; Gradl, W.; Hafner, A.; Alwyn, K. E.; Bailey, D.; Barlow, R. J.; Jackson, G.; Lafferty, G. D.; West, T. J.; Yi, J. I.; Anderson, J.; Chen, C.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.; Dallapiccola, C.; Salvati, E.; Cowan, R.; Dujmic, D.; Fisher, P. H.; Henderson, S. W.; Sciolla, G.; Spitznagel, M.; Yamamoto, R. K.; Zhao, M.; Patel, P. M.; Robertson, S. H.; Schram, M.; Biassoni, P.; Lazzaro, A.; Lombardo, V.; Palombo, F.; Stracka, S.; Cremaldi, L.; Godang, R.; Kroeger, R.; Sonnek, P.; Summers, D. J.; Zhao, H. W.; Simard, M.; Taras, P.; Nicholson, H.; de Nardo, G.; Lista, L.; Monorchio, D.; Onorato, G.; Sciacca, C.; Raven, G.; Snoek, H. L.; Jessop, C. P.; Knoepfel, K. J.; Losecco, J. M.; Wang, W. F.; Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Sekula, S. J.; Wong, Q. K.; Blount, N. L.; Brau, J.; Frey, R.; Igonkina, O.; Kolb, J. A.; Lu, M.; Rahmat, R.; Sinev, N. B.; Strom, D.; Strube, J.; Torrence, E.; Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.; Del Amo Sanchez, P.; Ben-Haim, E.; Bonneaud, G. R.; Briand, H.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Marchiori, G.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.; Gladney, L.; Biasini, M.; Manoni, E.; Angelini, C.; Batignani, G.; Bettarini, S.; Calderini, G.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.; Lopes Pegna, D.; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.; Anulli, F.; Baracchini, E.; Cavoto, G.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Li Gioi, L.; Mazzoni, M. A.

    2009-12-01

    We present updated measurements of the branching fractions for B0 meson decays to ηK0, ηη, ηϕ, ηω, η'K0, η'η', η'ϕ, and η'ω, and branching fractions and CP-violating charge asymmetries for B+ decays to ηπ+, ηK+, η'π+, and η'K+. The data represent the full data set of 467×106 BB¯ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory. Besides large signals for the four charged B decay modes and for B0→η'K0, we find evidence for three B0 decay modes at greater than 3.0σ significance. We find B(B0→ηK0)=(1.15-0.38+0.43±0.09)×10-6, B(B0→ηω)=(0.94-0.30+0.35±0.09)×10-6, and B(B0→η'ω)=(1.01-0.38+0.46±0.09)×10-6, where the first (second) uncertainty is statistical (systematic). For the B+→ηK+ decay mode, we measure the charge asymmetry Ach(B+→ηK+)=-0.36±0.11±0.03.

  3. Review of meson spectroscopy: quark states and glueballs

    International Nuclear Information System (INIS)

    A group of three lectures on hadron spectroscopy are presented. Topics covered include: light L = 0 mesons, light L = 1 mesons, antiquark antiquark quark quark exotics, a catalogue of higher quark antiquark excitations, heavy quarkonium, and glueballs

  4. Isospin breaking in the decay constants of heavy mesons from QCD sum rules

    CERN Document Server

    Lucha, Wolfgang; Simula, Silvano

    2016-01-01

    We present a study of the strong isospin-breaking (IB) effect, due in QCD to the difference between $u$- and $d$-quark masses, in the leptonic decay constants of charmed and beauty pseudoscalar and vector mesons using the method of QCD sum rules. We apply the sum-rule analysis to the decay constants of mesons containing one heavy quark and one light quark with the light mass in the range from the average $u/d$ quark mass to the strange-quark mass. We then analyse the dependence of the decay constants on the light-quark mass and extract with good accuracy the IB ratios of decay constants at leading order in the mass difference $(m_d - m_u)$, obtaining: $(f_{D^+} - f_{D^0}) / f_{D} = 0.0046 (6)$, $(f_{D^{*+}} - f_{D^{*0}}) / f_{D^*} = 0.0067 (9)$, $(f_{B^0} - f_{B^+}) / f_{B} = 0.0048 (6)$, and $(f_{B^{*0}} - f_{B^{*+}}) / f_{B^*} = 0.0045 (5)$, which yield: $f_{D^+} - f_{D^0} = 0.95 \\pm 0.13$ MeV, $f_{D^{*+}} - f_{D^{*0}} = 1.69 \\pm 0.27$ MeV, $f_{B^0} - f_{B^+} = 0.92 \\pm 0.13$ MeV, $f_{B^{*0}} - f_{B^{*+}} =...

  5. MesonNet 2014 International Workshop. Mini-proceedings

    CERN Document Server

    Adlarson, P; Bijnens, J; Balkeståhl, L Caldeira; Cao, B; Colangelo, G; Curciarello, F; De Leo, V; Demmich, K; Eichmann, G; Eidelman, S; Fang, S; Redmer, C F; Fritzsch, C; Gajos, A; Giovannella, S; Gonzàlez-Solís, S; Goudzovski, E; Heijkenskjöld, L; Hoferichter, M; Husek, T; Hüsken, N; Andersson, W I; Kadavý, T; Kamińska, D; Kampf, K; Knecht, M; Kolesár, M; Krusche, B; Kubis, B; Kupsc, A; Mascolo, M; Masjuan, P; Novotný, J; Procura, M; Ramstein, B; Sanchez-Puertas, P; Sarantsev, A; Schott, D; Somov, A; Spieker, K; Stoffer, P; Tulin, S; Wilson, A; Wirzba, A; Żurek, M

    2014-01-01

    The MesonNet International Workshop was held in the Laboratori Nazionali di Frascati from September the 29th to October the 1st, 2014, being the concluding meeting of the MesonNet research network within EU HadronPhysics3 project. MesonNet is a research network focused on light meson physics gathering experimentalist and theoreticians from Europe and abroad. An overview of the research projects related to the scope of the network is presented in these mini-proceedings.

  6. Massive mesons in Weyl-Dirac theory

    Science.gov (United States)

    Mirabotalebi, S.; Ahmadi, F.; Salehi, H.

    2008-01-01

    In order to study the mass generation of the vector fields in the framework of a conformal invariant gravitational model, the Weyl-Dirac theory is considered. The mass of the Weyl’s meson fields plays a principal role in this theory, it connects basically the conformal and gauge symmetries. We estimate this mass by using the large-scale characteristics of the observed universe. To do this we firstly specify a preferred conformal frame as a cosmological frame, then in this frame, we introduce an exact possible solution of the theory. We also study the dynamical effect of the massive vector meson fields on the trajectories of an elementary particle. We show that a local change of the cosmological frame leads to a Hamilton-Jacobi equation describing a particle with an adjustable mass. The dynamical effect of the massive vector meson field presents itself in the form of a correction term for the mass of the particle.

  7. Two, three, many body systems involving mesons

    CERN Document Server

    Oset, E; Khemchandani, K P; Roca, L; Yamagata, J

    2011-01-01

    In this talk we show recent developments on few body systems involving mesons. We report on an approach to Faddeev equations using chiral unitary dynamics, where an explicit cancellation of the two body off shell amplitude with three body forces stemming from the same chiral Lagrangians takes place. This removal of the unphysical off shell part of the amplitudes is most welcome and renders the approach unambiguous, showing that only on shell two body amplitudes need to be used. Within this approach, systems of two mesons and one baryon are studied, reproducing properties of the low lying $1/2^+$ states. On the other hand we also report on multirho and $K^*$ multirho states which can be associated to known meson resonances of high spin.

  8. δ Meson Effects on Asymmetric Nuclear Matter

    Science.gov (United States)

    Liu, B.; di Toro, M.; Greco, V.

    The impact of a δ meson field (the scalar-isovector channel) on asymmetric nuclear matter is studied within relativistic mean-field (RMF) models with both constant and density dependent (DD) nucleon-meson couplings. The Equation of State (EOS) for asymmetric nuclear matter and the neutron star properties by the different models are compared. We find that the δ-field in the constant coupling scheme leads to a larger repulsion in dense neutron-rich matter and to a definite splitting of proton and neutron effective masses, finally influencing the stability of the neutron stars. A broader analysis of possible δ-field effects is achieved considering also density dependent nucleon-meson coupling. A remarkable effect on the relation between mass and radius for the neutron stars is seen, showing a significant reduction of the radius along with a moderate mass reduction due to the increase of the effective δ coupling in high density regions.

  9. Thermal Fluctuation and Meson Melting: Holographic Approach

    CERN Document Server

    Ali-Akbari, M; Vahedi, A

    2014-01-01

    We use gauge/gravity duality to investigate the effect of thermal fluctuations on the dissociation of the quarkonium meson in strongly coupled $(3+1)$-dimensional gauge theories. This is done by studying the instability and probable first order phase transition of a probe D7-brane in the dual gravity theory. We explicitly show that for the Minkowski embeddings with their tips close to the horizon in the background, the long wavelength thermal fluctuations lead to an imaginary term in their action signaling an instability in the system. Due to this instability, a phase transition is expected. On the gauge theory side, it indicates that the quarkonium mesons are not stable and dissociate in the plasma. Identifying the imaginary part of the probe barne action with the thermal width of the mesons, we observe that the thermal width increases as one decreases the mass of the quarks. Also keeping the mass fixed, thermal width increases by temperature as expected.

  10. Exclusive vector meson production at HERMES

    Directory of Open Access Journals (Sweden)

    Movsisyan Aram

    2014-06-01

    Full Text Available Exclusive electroproduction of vector mesons has been measured on hydrogen and deuterium targets at HERMES using the 27.6 GeV electron/positron beam of HERA. From this process, more information can be obtained about generalized parton distributions (GPDs, which provide a unified description of the structure of hadrons embedding longitudinal-momentum distributions (ordinary PDFs and transverse-position information (form factors. The study of the azimuthal distribution of the decay products via spin-density matrix elements provide constraints on helicity-amplitudes used to describe exclusive vector-meson production. Recent results from the HERMES experiment on the production of rho, omega and phi mesons will be presented.

  11. Exclusive vector meson production at HERMES

    Science.gov (United States)

    Movsisyan, Aram

    2014-06-01

    Exclusive electroproduction of vector mesons has been measured on hydrogen and deuterium targets at HERMES using the 27.6 GeV electron/positron beam of HERA. From this process, more information can be obtained about generalized parton distributions (GPDs), which provide a unified description of the structure of hadrons embedding longitudinal-momentum distributions (ordinary PDFs) and transverse-position information (form factors). The study of the azimuthal distribution of the decay products via spin-density matrix elements provide constraints on helicity-amplitudes used to describe exclusive vector-meson production. Recent results from the HERMES experiment on the production of rho, omega and phi mesons will be presented.

  12. Mesons beyond the naive quark model

    CERN Document Server

    Amsler, C

    2004-01-01

    We discuss theoretical predictions for the existence of exotic (non-quark-model) mesons and review prominent experimental candidates. These are especially the f0(1500) and f0(1710) mesons for the scalar glueball, fJ(2220) for the tensor glueball, η(1410) for the pseudoscalar glueball, f0(600), f0(980), a0(980), the still to be firmly established κ(800) and the f2(1565) for or two-meson states, and π1(1400), π1(1600) for hybrid states. We conclude that some of these states exist, offer our views and discuss crucial issues that need to be investigated both theoretically and experimentally.

  13. Weak decays of K and π mesons

    International Nuclear Information System (INIS)

    Through a special interplay of strong and weak interactions, small but significant pieces with a ''wrong'' flavor could be introduced into wave functions of mesons. Thus, e.g., not only a (u bar s) pair, but also a (u bar d) pair can be found with some probability within K+, etc. The possible importance of such ''anomalous'' terms in understanding of K-meson decays is discussed in a new scheme. The scheme is characterized by diagrammatic calculations of full amplitudes in the long-distance environment. Two classes of models which correctly reproduce the main K-meson branching ratios and the ΔI=1/2 rule are constructed. The predictive power of the scheme is then tested in a decay of a kaon into a pion and a light hyperphoton

  14. Soft-gluon effects in nonleptonic decays of charmed mesons

    Energy Technology Data Exchange (ETDEWEB)

    Shizuya, Ken-ichi [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    1981-03-19

    In this paper, soft-gluon effects in nonleptonic decays of D and F mesons are studied nonperturbatively by use of a QCD multipole expansion. Finally, for reasonable values of D-meson bound-state parameters, the soft-gluon effects lead to a significant difference in the lifetimes of the D0 and D+ mesons.

  15. eta' meson production in proton-proton collisions

    OpenAIRE

    K Nakayama; Arellano, H. F.; Durso, J.W.; Speth, J.(Institut für Kernphysik, Forschungszentrum Jülich, Jülich, D-52425, Germany)

    1999-01-01

    The pp -> pp eta' reaction is investigated within a relativistic meson-exchange model of hadronic interactions. We explore the role of nucleonic and mesonic, as well as the N* resonance currents, in producing eta' mesons. In order to learn more about the production mechanisms, new measurements in the energy region far from the threshold are required.

  16. Valence and sea quark mixing in meson states

    Institute of Scientific and Technical Information of China (English)

    WangZi-Xing; SongHong-Qiu; 等

    1997-01-01

    A meson model with qq and (qq)2 mixing has been developed.The 0- meson state has been studied within this model space.Considerable qq and (qq)2 mixing has been found.The first excited state is in the energy range-1.5GeV,This state may be relevant to the new discovered exotic meson states.

  17. Scalar mesons in a linear sigma model with (axial-)vector mesons

    CERN Document Server

    Parganlija, D; Wolf, Gy; Giacosa, F; Rischke, D H

    2012-01-01

    The structure of the scalar mesons has been a subject of debate for many decades. In this work we look for $\\bar{q}q$ states among the physical resonances using an extended Linear Sigma Model that contains scalar, pseudoscalar, vector, and axial-vector mesons both in the non-strange and strange sectors. We perform global fits of meson masses, decay widths and amplitudes in order to ascertain whether the scalar $\\bar{q}q$ states are below or above 1 GeV. We find the scalar states above 1 GeV to be preferred as $\\bar{q}q$ states.

  18. Diffractive vector meson leptoproduction and spin effects

    CERN Document Server

    Goloskokov, S V

    2006-01-01

    We analyse spin effects in diffractive vector meson leptoproduction at small $x$ on the basis of the generalized parton distribution (GPD) approach. We take into account quark transverse degrees of freedom in the hard subprocess. We calculate amplitudes for the longitudinally and transversely polarized photons and vector mesons. Our results on the cross section and spin density matrix elements (SDME) are in fair agreement with the DESY experiments. Predictions for HERMES and COMPASS energy range are made. The predicted double spin longitudinal $A_{LL}$ asymmetry is not small at HERMES energies

  19. Mass shift of -meson in nuclear matter

    Indian Academy of Sciences (India)

    J R Morones-Ibarra; Mónica Menchaca Maciel; Ayax Santos-Guevara; Felipe Robledo Padilla

    2013-03-01

    The propagation of -meson in nuclear matter is studied in the Walecka model, by assuming that the sigma couples to a pair of nucleon–antinucleon states and to particle–hole states. The in-medium effect of - mixing is also studied. For completeness, the coupling of sigma to two virtual pions was also considered. It is found that the -meson mass decreases with respect to its value in vacuum and that the contribution of the - mixing effect on the mass shift is relatively small.

  20. Heavy Meson Molecules in Effective Field Theory

    OpenAIRE

    AlFiky, Mohammad T.; Gabbiani, Fabrizio; Petrov, Alexey A.

    2006-01-01

    We consider the implications from the possibility that the recently observed state X(3872) is a meson-antimeson molecule. We write an effective Lagrangian consistent with the heavy-quark and chiral symmetries needed to describe X(3872). We explore the consequences of the assumption that X(3872) is a molecular bound state of D^{*0} and anti-D^0 mesons for the existence of bound states in the D^0-anti-D^0 and D^{*0}-anti-D^{*0}.

  1. Turbulent meson condensation in quark deconfinement

    Directory of Open Access Journals (Sweden)

    Koji Hashimoto

    2015-06-01

    Full Text Available In a QCD-like strongly coupled gauge theory at large Nc, using the AdS/CFT correspondence, we find that heavy quark deconfinement is accompanied by a coherent condensation of higher meson resonances. This is revealed in non-equilibrium deconfinement transitions triggered by static, as well as quenched electric fields even below the Schwinger limit. There, we observe a “turbulent” energy flow to higher meson modes, which finally results in the quark deconfinement. Our observation is consistent with seeing deconfinement as a condensation of long QCD strings.

  2. Light $O^{++}$ Mesons: Scalargators in Florida

    CERN Document Server

    Pennington, M R

    2010-01-01

    Light scalar mesons abound in hadron processes, like the alligators in the Florida Everglades. Moreover, scalars are intimately tied to the vacuum structure of QCD. They are the product of many decays. Consequently, a rich source of recent information about them has come from experiments producing heavy flavour mesons. Indeed, scalars will continue to dominate many of the processes to be studied at forthcoming facilities like BESIII in Beijing, FAIR at GSI Darmstadt and the GlueX experiment at JLab, making an understanding (or at least an excellent and theoretically consistent description) essential for the physics missions of these facilities.

  3. Light O++ Mesons: Scalargators in Florida

    International Nuclear Information System (INIS)

    Light scalar mesons abound in hadron processes, like the alligators in the Florida Everglades. Moreover, scalars are intimately tied to the vacuum structure of QCD. They are the product of many decays. Consequently, a rich source of recent information about them has come from experiments producing heavy flavour mesons. Indeed, scalars will continue to dominate many of the processes to be studied at forthcoming facilities like BESIII in Beijing, FAIR at GSI Darmstadt and the GlueX experiment at JLab, making an understanding (or at least an excellent and theoretically consistent description) essential for the physics missions of these facilities.

  4. $B$ and $B_s$ Meson Spectroscopy

    CERN Document Server

    Godfrey, S; Swanson, E S

    2016-01-01

    Properties of bottom and bottom-strange mesons are computed in two relativized quark models. Model masses and wavefunctions are used to predict radiative transition rates and the $^3P_0$ quark pair creation model is used to compute strong decay widths. A comparison to recently observed bottom and bottom-strange states is made. We find that there are numerous excited $B$ and $B_s$ mesons that have relatively narrow widths and significant branching ratios to simple final states such as $B\\pi$, $B^*\\pi$, $BK$, and $B^*K$ that could be observed in the near future.

  5. Pseudoscalar meson physics with four dynamical quarks

    CERN Document Server

    Bazavov, A; Bouchard, C; DeTar, C; Du, D; El-Khadra, A X; Foley, J; Freeland, E D; Gamiz, E; Gottlieb, Steven; Heller, U M; Hetrick, J E; Kim, J; Kronfeld, A S; Laiho, J; Levkova, L; Lightman, M; Mackenzie, P B; Neil, E T; Oktay, M; Simone, J N; Sugar, R L; Toussaint, D; Van de Water, R S; Zhou, R

    2012-01-01

    We present preliminary results for light, strange and charmed pseudoscalar meson physics from simulations using four flavors of dynamical quarks with the highly improved staggered quark (HISQ) action. These simulations include lattice spacings ranging from 0.15 to 0.06 fm, and sea-quark masses both above and at their physical value. The major results are charm meson decay constants f_D, f_{D_s} and f_{D_s}/f_D and ratios of quark masses. This talk will focus on our procedures for finding the decay constants on each ensemble, the continuum extrapolation, and estimates of systematic error.

  6. CP violation in B meson decays

    Science.gov (United States)

    Noguchi, S.; Belle Group

    2003-06-01

    CP violation in neutral B meson decays has been observed confirming the prediction of the Kobayashi-Maskawa model where introduction of six quaks naturally induces CP violation in the weak interaction. The measurements of CP asymmetryc in B meson decays were made at the newly constructed Asymmetric B factories, which consist of high luminosity, ebergy-asymmetric e+e- colliders (KEKB and PEP-II) and detectors (Belle and BaBar). The results are in good agreement and are consistent with other experimental results within the framework of the Standard Model.

  7. Soft-wall modelling of meson spectra

    CERN Document Server

    Afonin, S S

    2016-01-01

    The holographic methods inspired by the gauge/gravity correspondence from string theory have been actively applied to the hadron spectroscopy in the last eleven years. Within the phenomenological bottom-up approach, the linear Regge-like trajectories for light mesons are naturally reproduced in the so-called "Soft-wall" holographic models. I will give a very short review of the underlying ideas and technical aspects related to the meson spectroscopy. A generalization of soft-wall description of Regge trajectories to arbitrary intercept is proposed. The problem of incorporation of the chiral symmetry breaking is discussed.

  8. El ojo hermoso The beautiful eye

    Directory of Open Access Journals (Sweden)

    O. M. Ramírez

    2007-06-01

    Full Text Available Como cirujanos estéticos siempre nos esforzamos por alcanzar resultados hermosos que sean agradables a los sentidos. Esto es particularmente cierto en el terreno del rejuvenecimiento periorbitario. Según la estadística de la Sociedad Americana de Cirujanos Plásticos la blefaroplastia estética es uno de los procedimientos mas frecuentes y su frecuencia va en aumento tanto en hombres como en mujeres. El rejuvenecimiento periorbitario adecuado debería restaurar la percepción interior del paciente respecto a belleza y juventud de sus ojos, así como proporcionar un aspecto externo que sea "estético" o agradable a los sentidos. Para lograr este objetivo, se requiere una comprensión de la estética facial, tanto en términos subjetivos como objetivos. Los investigadores han demostrado que la percepción del atractivo o la belleza en la cara de un individuo es relativamente constante entre observadores independientes, desafiando el dicho popular de que "la belleza está en el ojo del espectador." Presentamos una actualización del tema y una amplia iconografía. La información recogida de la literatura y de años experiencia clínica debería permitir al lector desarrollar una mayor sensibilidad estética, para obtener resultados óptimos en el rejuvenecimiento periorbitario.As aesthetic surgeons we are always striving to achieve beautiful results that are pleasurable to the senses. This is particularly certain in the land of the periorbital rejuvenation. According to the statistics of the American Society of Plastic Surgeons, aesthetic blepharoplasty is one of the procedures most commonly performed and goes in increase its so much frequency in men as in women. Successful periorbital rejuvenation should restore the patient"s inner sense of beauty and youthfulness as well as provide an outward appearance that is ‘aesthetic" or pleasurable to the senses. To accomplish this lofty goal, the aesthetic surgeon must strive to create "the beautiful

  9. Issues in light meson spectroscopy: The case for meson spectroscopy at CEBAF

    Energy Technology Data Exchange (ETDEWEB)

    Godfrey, S. [Carleton Univ., Ottawa (Canada)

    1994-04-01

    The author reviews some outstanding issues in meson spectroscopy. The most important qualitative issue is whether hadrons with explicit gluonic degrees of freedom exist. To answer this question requires a much better understanding of conventional q{bar q} mesons. The author therefore begins by examining the status of conventional meson spectroscopy and how the situation can be improved. The expected properties of gluonic excitations are discussed with particular emphasis on hybrids to give guidance to experimental searches. Multiquark systems are commented upon as they are likely to be important in the mass region under study and will have to be understood better. In the final section the author discusses the opportunities that CEBAF can offer for the study of meson spectroscopy.

  10. Two, three, many body systems involving mesons. Multimeson condensates

    CERN Document Server

    Oset, E; Dote, A; Hyodo, T; Khemchandani, P K; Liang, W H; Torres, A Martinez; Oka, M; Roca, L; Uchino, T; Xiao, C W

    2015-01-01

    In this talk we review results from studies with unconventional many hadron systems containing mesons: systems with two mesons and one baryon, three mesons, some novel systems with two baryons and one meson, and finally systems with many vector mesons, up to six, with their spins aligned forming states of increasing spin. We show that in many cases one has experimental counterparts for the states found, while in some other cases they remain as predictions, which we suggest to be searched in BESIII, Belle, LHCb, FAIR and other facilities.

  11. Charm and beauty production at RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Kabana, Sonia [Laboratoire de Physique Subatomique et des Technologies Associees (SUBATECH), Ecole des Mines, 4 rue Alfred Kastler, 44307 Nantes (France)

    2011-01-15

    We review selected highlights on charm and beauty production at RHIC from p+p, d+Au and A+A collisions at {radical}(s{sub NN})=200GeV, and compare them to model calculations. We focus on two particular issues, jet quenching and quarkonia. Anomalous energy loss (jet quenching) of quarks passing through the dense and hot matter built in heavy ion collisions is one of the outstanding discoveries made at RHIC. This phenomenon allows for an estimate of the initial gluon density. Furthermore, color screening of hidden charm and beauty states is a key signature of the QCD phase transition, allowing an estimate of the initial temperature. We present results on the flavour dependence of jet quenching. Heavy flavour production in A+A as compared to p+p collisions will be discussed for open and hidden charm.

  12. Hidden Beauty in Twisted Viking Neck Rings

    CERN Document Server

    Olsen, Kasper

    2010-01-01

    Many hoards found in Ireland, Scotland, Orkney Islands, and Scandinavia demonstrate the vikings ability to fabricate beautiful arm and neck rings of twisted silver and gold rods. Characteristic for such rings is the uniform appearance of the twisted pattern along the length of the arm ring, as well as from one arm ring to another, also when found at distant geographical locations. How can the appearance of the twisted wires be so perfectly repetitive? We demonstrate that the answer is that the vikings utilized a self-forming motif: The pattern arises from a twisting of the wires to a maximally rotated configuration. That is why the twist patterns in these arm and neck rings are beautiful, repetitive, and universal.

  13. Truth, virtue and beauty: midwifery and philosophy.

    Science.gov (United States)

    Parker, J M; Gibbs, M

    1998-09-01

    In this paper, we outline three moments in the history of Western philosophy--Classical Greek, Modernity, Postmodernity--and the ways in which issues of truth, virtue and beauty have been understood within these philosophical formations. In particular, we investigate the ways in which notions of truth, virtue and beauty influenced the orthodoxy of birthing practices at these different moments. Finally, we examine current, critical reflections on the role of the intellectual in postmodern society and use these reflections as a heuristic for understanding the role of the contemporary midwife. We suggest that midwifery must reconcile two divergent demands. The first is to mobilise the positive, instrumental benefits of Western medical science to improve mortality and morbidity outcomes. The second is to remain sensitive to the cultural and social meanings attached to traditional birthing practices and to understand the roles these play in the well-being of mother and child.

  14. The Hidden Beauty in Biomedical Imaging.

    Science.gov (United States)

    Barker, Norman; Iacobuzio-Donahue, Christine

    2015-01-01

    Caretakers, researchers and photographers working in a busy academic settings, every day are faced with images that are awe-inspiring for their beauty and for the terror they may represent to patients suffering from disease. Beauty in this context is a relative term. It may be seen as the delicate lacework of cells within the normal human brain reminiscent of a Jackson Pollack masterpiece, or the multitude of colors and textures formed by fungal organisms in a microbiology lab. Herein lies the juxtaposition image makers seek to represent. When contemplated in isolation, each represents a visually interesting image. However, when viewed with an awareness of the context in which the image was obtained, each image takes on the ability to evoke an alternative human emotion.

  15. China's Most Beautiful Books

    Institute of Scientific and Technical Information of China (English)

    WuLiang

    2005-01-01

    “China's Most Beautiful Books 2004”, an annual national award for books' graphic design, came out in Shanghai in January, 2005. Twenty-four publications won the titles and were recommended to participate in “The Most Beautiful Books of the World 2005” competition which will be held in Leibzig, Germany. The award winners included both best sellers with simplistic design such as “Us Three” and “Niu Niu: A Father's Notes”, and thread-bound traditional books such as “Ma De's Painting Album”, “Nanmu Carvings in West of Hunan Province”, “Watch the Three Gorges” and “Culture of Southeast China: Key Words”。

  16. Beautiful seasons of Pan’an

    Institute of Scientific and Technical Information of China (English)

    季陈熙; 陈妙芳

    2015-01-01

    I.m from Pan an,It s a small town of Zhejiang.Do you know?It s the most beautiful palce in my heart.Panan is a bes place to live.In Pan an,The water is clean,the trees are green,the air is very fresh.In an increasingly harsh environment,PM2.5 is also rampant worldwide,Pan an is getting more and more popula

  17. Sleeping Beauty: Kleine–Levin Syndrome

    OpenAIRE

    Mudgal, Soumiya; Jiloha, R. C.; Kandpal, Manish; Das, Aparna,

    2014-01-01

    Kleine–Levin syndrome (KLS) alias sleeping beauty syndrome, is a rare sleep disorder. Clinically presenting as episodes of hypersomnolence, behavioral and cognitive disturbances, hyperphagia and hypersexuality. KLS may have an idiopathic onset or may be precipitated by neurological event or infection. Until date, no definite underlying cause is established and neither there are any definitive management guidelines. It remains a diagnosis of exclusion after other psychiatric and neurological c...

  18. The 2012 Interferometric Imaging Beauty Contest

    OpenAIRE

    Baron, Fabien; Cotton, William D.; Lawson, Peter R.; Ridgway, Steve T.; Aarnio, Alicia; Monnier, John D.; Hofmann, Karl-Heinz; Schertl, Dieter; Weigelt, Gerd; Thiébaut, Eric; Soulez, Férréol; Mary, David; Millour, Florentin; Vannier, Martin; Young, John

    2012-01-01

    We present the results of the fifth Interferometric Imaging Beauty Contest. The contest consists in blind imaging of test data sets derived from model sources and distributed in the OIFITS format. Two scenarios of imaging with CHARA/MIRC-6T were offered for reconstruction: imaging a T Tauri disc and imaging a spotted red supergiant. There were eight different teams competing this time: Monnier with the software package MACIM; Hofmann, Schertl and Weigelt with IRS; Thi\\'ebaut and Soulez with M...

  19. Hidden Beauty in Twisted Viking Neck Rings

    OpenAIRE

    Olsen, Kasper; Bohr, Jakob

    2010-01-01

    Many hoards found in Ireland, Scotland, Orkney Islands, and Scandinavia demonstrate the vikings ability to fabricate beautiful arm and neck rings of twisted silver and gold rods. Characteristic for such rings is the uniform appearance of the twisted pattern along the length of the arm ring, as well as from one arm ring to another, also when found at distant geographical locations. How can the appearance of the twisted wires be so perfectly repetitive? We demonstrate that the answer is that th...

  20. The neural correlates of beauty comparison

    OpenAIRE

    Kedia, Gayannée; Mussweiler, Thomas; Mullins, Paul; Linden, David E. J.

    2013-01-01

    Beauty is in the eye of the beholder. How attractive someone is perceived to be depends on the individual or cultural standards to which this person is compared. But although comparisons play a central role in the way people judge the appearance of others, the brain processes underlying attractiveness comparisons remain unknown. In the present experiment, we tested the hypothesis that attractiveness comparisons rely on the same cognitive and neural mechanisms as comparisons of simple nonsocia...

  1. Glumpy : Fast, scalable and beautiful scientific visualization

    OpenAIRE

    Rougier, Nicolas P.

    2015-01-01

    Glumpy is a python library for scientific visualization that is both fast, scalable and beautiful. Glumpy offers an intuitive interface between numpy and modern OpenGL. Numpy arrays are tracked automatically such that any change on the CPU is reflected automatically on the GPU, making the integration seamless. glumpy provides more than 100 examples showing how to achieve this or that visualization, such as antialiasing, text rendering, isolines computation, image filtering, cartographic proje...

  2. Productivity or Discrimination? Beauty and the Exams

    OpenAIRE

    Giam Pietro Cipriani; Angelo Zago

    2005-01-01

    Do good looks make people more productive? An impact of looks on earnings has been found in the empirical literature: plain people earn less than average-looking people who earn less than the good-looking. However, an important question remains unanswered: is the impact of beauty due to pure discrimination or productivity? We provide evidence against the hypothesis of Becker-type discrimination stemming from tastes and in favor of productivity-related discrimination.

  3. ''Beauty of Wholeness and Beauty of Partiality.'' New Terms Defining the Concept of Beauty in Architecture in Terms of Sustainability and Computer Aided Design

    Science.gov (United States)

    Farid, Ayman A.; Zaghloul, Weaam M.; Dewidar, Khaled M.

    2014-01-01

    The great shift in sustainability and computer aided design in the field of architecture caused a remarkable change in the architecture philosophy, new aspects of beauty and aesthetic values are being introduced, and traditional definitions for beauty cannot fully cover this aspects, which causes a gap between; new architecture works criticism and…

  4. Mesons in the Constituent Quark Model

    Institute of Scientific and Technical Information of China (English)

    WANG Li; PING Jia-Lun

    2007-01-01

    The quark-antiquark (q(-q)) spectrum is studied by solving the Schrǒdinger equation in the framework of non-relativistic constituent quark model. An overall good fit to the experimental data of meson is obtained. The interactions between quark and antiquark consist of quadratic colour confinement-exchange, one-gluon-exchange, and Goldstone-boson-exchange potentials.

  5. Extracting excited mesons from the finite volume

    Energy Technology Data Exchange (ETDEWEB)

    Doring, Michael [George Washington Univ., Washington, DC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

    2014-12-01

    As quark masses come closer to their physical values in lattice simulations, finite volume effects dominate the level spectrum. Methods to extract excited mesons from the finite volume are discussed, like moving frames in the presence of coupled channels. Effective field theory can be used to stabilize the determination of the resonance spectrum.

  6. New physics effects from meson decays

    Indian Academy of Sciences (India)

    Anirban Kundu

    2000-07-01

    In this talk, we point out some of the present and future possible signatures of physics beyond the Standard Model from -meson decays, taking -parity conserving and violating supersymmetry as illustrative examples. An expanded version is available on hep-ph archive.

  7. Meson Screening Masses in Thermal QCD

    Directory of Open Access Journals (Sweden)

    Czerski Piotr

    2012-12-01

    Full Text Available The quark-gluon plasma (QGP excitations, corresponding to the scalar and pseudoscalar meson quantum numbers, for different temperatures are calculated. Analysis is performed in the Hard Thermal Loop (HTL Approximation and leads to a better understanding of the excitations of QGP in the deconfined phase and is also of relevance for lattice studies.

  8. Charmonium meson and hybrid radiative transitions

    Energy Technology Data Exchange (ETDEWEB)

    Guo, Peng [Indiana U., JLAB; Yépez-Martínez, Tochtli [Indiana U.; Szczepaniak, Adam P. [Indiana U., JLAB

    2014-06-01

    We consider the non-relativistic limit of the QCD Hamiltonian in the Coulomb gauge, to describe radiative transitions between conventional charmonium states and from the lowest multiplet of cc¯ hybrids to charmonium mesons. The results are compared to potential quark models and lattices calculations.

  9. Lattice investigation of heavy meson interactions

    OpenAIRE

    Wagenbach, Björn; Bicudo, Pedro; Wagner, Marc

    2014-01-01

    We report on a lattice investigation of heavy meson interactions and of tetraquark candidates with two very heavy quarks. These two quarks are treated in the static limit, while the other two are up, down, strange or charm quarks of finite mass. Various isospin, spin and parity quantum numbers are considered.

  10. Meson spectroscopy in large-N QCD

    Energy Technology Data Exchange (ETDEWEB)

    Castagnini, Luca

    2015-06-23

    We present the results of a systematic, first-principles study of the spectrum and decay constants of mesons for different numbers of color charges N, via lattice computations. We discuss the extrapolations to the chiral, continuum and large-N limits and present a comparison of our results to some of the numerical computations and analytical predictions available in the literature.

  11. Preliminary Results on Charmed Meson Spectroscopy

    CERN Document Server

    Sarwar, S; Paolone, V S; Reyes, M; Anjos, J C; Yager, P M; Bediaga, I; Göbel, C; Magnin, J; De Miranda, J M; Pepe, I M; Dos Reis, A C; Simão, F R A; Carrillo, S; Casimiro, E; Méndez, H; Sánchez-Hernández, A; Uribe, C; Vásquez, F; Cinquini, L; Cumalat, J P; Ramírez, J E; O'Reilly, B; Vaandering, E W; Butler, J N; Cheung, H W K; Gaines, I; Garbincius, P H; Garren, L A; Gottschalk, E E; Gourlay, S A; Kasper, P H; Kreymer, A E; Kutschke, R; Bianco, S; Fabbri, Franco Luigi; Sarwar, S; Cawlfield, C; Kim, D Y; Park, K S; Rahimi, A; Gardner, R; Chung, Y S; Kang, J S; Ko, B R; Kwak, J W; Lee, K B; Myung, S S; Alimonti, G; Boschini, M; Brambilla, D; Caccianiga, B; Calandrino, A; D'Angelo, P; Di Corato, M; Dini, P; Giammarchi, M G; Inzani, P; Leveraro, F; Malvezzi, S; Menasce, D; Mezzadri, M; Milazzo, L; Moroni, L; Pedrini, D; Prelz, F; Rovere, M; Sala, A; Sala, S; Arena, V; Boca, G; Bonomi, G; Gianini, G; Liguori, G; Merlo, M; Pantea, D; Ratti, S P; Riccardi, C; Torre, P; Viola, L; Vitulo, P; Hernández, Pilar; López, A M; Méndez, L; Mirles, M A; Montiel, E; Olaya, D; Quinones, J; Rivera, C; Zhang-Mayaguez, Y; Copty, N K; Purohit, M; Cho, K; Handler, T; Engh, D; Johns, W E; Hosack, M; Nehring, M S; Sales, M; Sheldon, P D; Stenson, K; Webster, M S; Sheaff, M; Kwon, Y; Sarwar, Shahzad

    2001-01-01

    We report the preliminary measurement by the FOCUS Collaboration (E831 at Fermilab) of masses and widths of the L=1 charm mesons $D_2^{*0}$ and $D_2^{*+}$. The fit of the invariant mass distribution requires an additional term to account for a broad structure over background.

  12. Meson spectroscopy in large-N QCD

    International Nuclear Information System (INIS)

    We present the results of a systematic, first-principles study of the spectrum and decay constants of mesons for different numbers of color charges N, via lattice computations. We discuss the extrapolations to the chiral, continuum and large-N limits and present a comparison of our results to some of the numerical computations and analytical predictions available in the literature.

  13. Light Meson Dynamics Workshop. Mini proceedings

    CERN Document Server

    Bijnens, J; Fang, S; Giovannella, S; Gradl, W; Hanhart, C; Leupold, B Kubis S; Lutz, M F M; Masjuan, P; Moussallam, B; Nieser, A; Oset, E; Ostrick, M; Pelaez, J R; Scherer, S; Švarc, A; Unverzagt, M; Wanke, R; Wolke, M

    2014-01-01

    The mini-proceedings of the Light Meson Dynamics Workshop held in Mainz from February 10th to 12th, 2014, are presented. The web page of the conference, which contains all talks, can be found at https://indico.cern.ch/event/287442/overview .

  14. Electromagnetic Form Factor of Charged Scalar Meson

    Institute of Scientific and Technical Information of China (English)

    LI Heng-Mei; CHEN Ning; WANG Zhi-Gang; WAN Shao-Long

    2007-01-01

    Wavefunctions and the electromagnetic form factor of charged scalar mesons are studied with the vector-vectortype flat-bottom potential model under the framework of the spinor spinor Bethe Salpeter equation. The obtained results are in agreement with other theories.

  15. Probing Polarized Parton Distributions with Meson Photoproduction

    CERN Document Server

    Afanasiev, A M; Wahlquist, C; Afanasev, Andrei; Carlson, Carl E.; Wahlquist, Christian

    1997-01-01

    Polarization asymmetries in photoproduction of high transverse momentum mesons are a flavor sensitive way to measure the polarized quark distributions. We calculate the expected asymmetries in several models, and find that the asymmetries are significant and also significantly different from model to model. Suitable data may come as a by-product of deep inelastic experiments to measure $g_1$ or from dedicated experiments.

  16. QED effects in the pseudoscalar meson sector

    Energy Technology Data Exchange (ETDEWEB)

    Horsley, R. [Edinburgh Univ. (United Kingdom). School of Physics and Astronomy; Nakamura, Y. [RIKEN Advanced Institute for Computational Science, Kobe (Japan); Perlt, H. [Leipzig Univ. (Germany). Inst. fuer Theoretische Physik; Collaboration: QCDSF-UKQCD Collaboration; and others

    2015-09-15

    We present results on the pseudoscalar meson masses from a fully dynamical simulation of QCD+QED. We concentrate particularly on violations of isospin symmetry. We calculate the π{sup +}-π{sup 0} splitting and also look at other isospin violating mass differences. We have presented results for these isospin splittings in arXiv:1508.06401 [hep-lat]. In this paper we give more details of the techniques employed, discussing in particular the question of how much of the symmetry violation is due to QCD, arising from the different masses of the u and d quarks, and how much is due to QED, arising from the different charges of the quarks. This decomposition is not unique, it depends on the renormalisation scheme and scale. We suggest a renormalisation scheme in which Dashen's theorem for neutral mesons holds, so that the electromagnetic self-energies of the neutral mesons are zero, and discuss how the self-energies change when we transform to a scheme such as MS, in which Dashen's theorem for neutral mesons is violated.

  17. Lifetimes of charm and beauty hadrons

    Science.gov (United States)

    Bellini, G.; Bigi, I. I.; Dornan, P. J.

    1997-10-01

    Major breakthroughs have been achieved in the determination of the lifetimes of charm and beauty hadrons. Much larger data samples than previously have become available and new experimental devices and techniques have been developed and employed. The lifetimes of all weakly decaying singly charmed hadrons have been measured, some with an accuracy of a few percent. The difference in the shortest lifetime - τ(Ω c) - and the longest one - τ( D+) - is given by a factor of close to ten. The experimental status of beauty lifetimes, while less complete, has still reached a new level of quality and is now better than 5% for the commoner states. New theoretical tools, based mainly on heavy quark expansions, have been developed; they incorporate as well as transcend earlier phenomenological descriptions. The observed pattern in the charm lifetime ratios is reproduced in a semi-quantitative manner as well as could be expected; as far as the beauty lifetime ratios are concerned some problems may well be emerging. The maturity level achieved in the measurements bodes quite well for future challenges where reliable and efficient tracking of the decay vertices will be crucial.

  18. Conceptual design of a ring beauty factory

    International Nuclear Information System (INIS)

    This paper reports on the design of the B-meson factory with an expected luminosity of 1033-1034 cm-2s-1 in the energy range of 4.5-6.5 GeV per beam under consideration at the Novosibirsk Institute of Nuclear Physics. The facility will consist of two main parts: the injector and the B-meson factory itself. A 100 m linear electron accelerator to 10 GeV was chosen as an injector. Such a linac is the prototype of the linear collider VLEPP. The injector is expected to feed the B-factory with 1010 electrons and positrons per second directly on the experimental energy. The B-meson factory itself will be about 500 m double ring with combined insertions in the interaction region. In both rings up to 20 bunches will be operated simultaneously. The beams interact one with the other at one interaction point (IP) only. Besides the opportunity to operate with a great number of bunches, an enhancement in luminosity is supposed to be achieved due to mini-beta function that results from a strong bunch length decrease, as well as due to the monochromatization collision scheme

  19. The Most Beautiful Heart%最美丽的心

    Institute of Scientific and Technical Information of China (English)

    章纯

    2010-01-01

    @@ One day a young man was standing in the middle of the town proclaiming that he had the most beautiful heart in the whole valley.A large crowd gathered and they all admired his heart for it was perfect.There was not a mark or a flaw in it.Yes,they all agreed it truly was the most beautiful heart they had ever seen.The young man was very proud and boasted1 more loudly about his beautiful heart.

  20. A hyperactive sleeping beauty transposase enhances transgenesis in zebrafish embryos

    OpenAIRE

    Lardelli Michael; Newman Morgan

    2010-01-01

    Abstract Background Transposons are useful molecular tools for transgenesis. The 'sleeping beauty' transposon is a synthetic member of the Tc1/mariner transposon family. Davidson et al. (2003) previously described a vector for zebrafish transgenesis consisting of the inverted repeats of 'sleeping beauty' flanking the gene to be transposed. Subsequently, there have been attempts to enhance the transpositional activity of 'sleeping beauty' by increasing the activity of its transposase. Recently...

  1. The prostitute's allure: Examining returns to beauty, productivity and discrimination

    OpenAIRE

    Arunachalam, Raj; Shah, Manisha

    2010-01-01

    We estimate the earnings premium for beauty in an occupation where returns to physical attractiveness are likely to be important: commercial sex work. In the commercial sex market, perhaps more so than any other sector in the labor market, the beauty premium should be at the extreme due to the intimate interpersonal relationships required with clients. Therefore, the commercial sex sector provides the cleanest test for whether the beauty premium is driven solely by productivity. Somewhat surp...

  2. Beauty in abstract paintings: Perceptual contrast and statistical properties

    Directory of Open Access Journals (Sweden)

    Birgit eMallon

    2014-03-01

    Full Text Available In this study, we combined the behavioral and objective approach in the field of empirical aesthetics. First, we studied the perception of beauty by investigating shifts in evaluation on perceived beauty of abstract artworks (Experiment 1. Because the participants showed heterogeneous individual preferences for the paintings, we divided them into seven clusters for the test. The experiment revealed a clear pattern of perceptual contrast. The perceived beauty of abstract paintings increased after exposure to paintings that were rated as less beautiful, and it decreased after exposure to paintings that were rated as more beautiful. Next, we searched for correlations of beauty ratings and perceptual contrast with statistical properties of abstract artworks (Experiment 2. The participants showed significant preferences for certain image properties. These preferences differed between the clusters of participants. Strikingly, next to color measures like hue, saturation, value and lightness, the recently described PHOG self-similarity value seems to be a predictor for aesthetic appreciation of abstract artworks. We speculate that the shift in evaluation in Experiment 1 was, at least in part, based on low-level adaptation to some of the statistical image properties analyzed in Experiment 2. In conclusion, our findings demonstrate that the perception of beauty in abstract artworks is altered after exposure to beautiful or non-beautiful images and correlates with particular image properties, especially color measures and self-similarity.

  3. Beauty in abstract paintings: perceptual contrast and statistical properties

    Science.gov (United States)

    Mallon, Birgit; Redies, Christoph; Hayn-Leichsenring, Gregor U.

    2014-01-01

    In this study, we combined the behavioral and objective approach in the field of empirical aesthetics. First, we studied the perception of beauty by investigating shifts in evaluation on perceived beauty of abstract artworks (Experiment 1). Because the participants showed heterogeneous individual preferences for the paintings, we divided them into seven clusters for the test. The experiment revealed a clear pattern of perceptual contrast. The perceived beauty of abstract paintings increased after exposure to paintings that were rated as less beautiful, and it decreased after exposure to paintings that were rated as more beautiful. Next, we searched for correlations of beauty ratings and perceptual contrast with statistical properties of abstract artworks (Experiment 2). The participants showed significant preferences for particular image properties. These preferences differed between the clusters of participants. Strikingly, next to color measures like hue, saturation, value and lightness, the recently described Pyramid of Histograms of Orientation Gradients (PHOG) self-similarity value seems to be a predictor for aesthetic appreciation of abstract artworks. We speculate that the shift in evaluation in Experiment 1 was, at least in part, based on low-level adaptation to some of the statistical image properties analyzed in Experiment 2. In conclusion, our findings demonstrate that the perception of beauty in abstract artworks is altered after exposure to beautiful or non-beautiful images and correlates with particular image properties, especially color measures and self-similarity. PMID:24711791

  4. The True Bride: Perceptions of Beauty and Feminine Virtue in Folktales.

    Science.gov (United States)

    Trousdale, Ann

    1989-01-01

    Discusses the quality of the heroines' beauty in several folktales from various cultures. Notes that, unlike Western cultures that equate physical beauty with virtue, in many cultures, beauty is viewed as spiritual and emotional as well as physical. (MM)

  5. Spin O decay angular distribution for interfering mesons in electroproduction

    Energy Technology Data Exchange (ETDEWEB)

    Funsten, H.; Gilfoyle, G.

    1994-04-01

    Self analyzing meson electroproduction experiments are currently being planned for the CEBAF CLAS detector. These experiments deduce the spin polarization of outgoing unstable spin s (?)0 mesons from their decay angular distribution, W({theta},{psi}). The large angular acceptance of the CLAS detector permits kinematic tracking of a sufficient number of these events to accurately determine electroproduction amplitudes from the deduced polarization. Maximum polarization information is obtained from W({theta},{psi}) for decay into spin 0 daughters. The helicity of the decaying meson is transferred to the daughter`s relative orbital angular momentum m-projection; none is {open_quotes}absorbed{close_quotes} into daughter helicities. The decaying meson`s helicity maximally appears in W({theta},{psi}). W({theta},{psi}) for spin 0 daughters has been derived for (1) vector meson electroproduction and (2) general interfering mesons produced by incident pions. This paper derives W({theta},{psi}) for electroproduction of two interfering mesons that decay into spin 0 daughters. An application is made to the case of interfering scalar and vector mesons. The derivation is an extension of work by Schil using the general decay formalism of Martin. The expressions can be easily extended to the case of N interfering mesons since interference occurs pairwise in the observable W ({theta},{psi}), a quadratic function of the meson amplitudes. The derivation uses the virtual photon density matrix of Schil which is transformed by a meson electroproduction transition operator, T. The resulting density matrix for the interfering mesons is then converted into a corresponding statistical tensor and contracted into the efficiency tensor for spin 0 daughters.

  6. Beautiful Architecture Leading Thinkers Reveal The Hidden Beauty In Software Design

    CERN Document Server

    Spinellis, Diomidis

    2009-01-01

    What are the ingredients of robust, elegant, flexible, and maintainable software architecture? Beautiful Architecture answers this question through a collection of intriguing essays from more than a dozen of today's leading software designers and architects. In each essay, contributors present a notable software architecture, and analyze what makes it innovative and ideal for its purpose.

  7. [Beauty judgment: review of the literature].

    Science.gov (United States)

    Faure, Jacques; Bolender, Yves

    2014-03-01

    Esthetic judgments are surely subjective, but as surely, that does not preclude them being studied objectively through rigorous scientific methods. The factual basis of a science of esthetics is not to settle whether some person or image is "objectively beautiful" but rather to determine whether some representative set or sets of individuals judge or experience him/her/it as beautiful or unattractive. The aim of this paper is to review the definitional, theoretical and methodological aspects pertaining to the perception of facial/dental attractiveness by a group of representative individuals. The first part lays down the basic principles of the perception of facial/dental attractiveness: the perception involves a jury, a field of investigation and a test providing quantitative data; the following general determinants of beauty perception are reviewed: the average morphology, the judge's cultural background, the numerology, the judge's ethnical origin. Indirect determinants are the dentition, the osseous architecture and the muscular envelope. Some disruptive factors might alter the judges' facial perception. They might be qualified as either peripheral to the face or psycho-social factors. Peripheral factors include hair style and color, skin hue, wrinkles, lips color... Psycho-social factors cover the personality of the subject being evaluated, his/her intelligence or behavior. The second part deals specifically with the methodology used to determine facial attractiveness and to correlate this latter with a specific morphology. Typically such a study aims to determine average esthetic preferences for some set of visual displays among a particular jury, given a specific task to judge esthetic quality or qualities. The sample being studied, the displays, the jury or jurys, the rating procedure must all be specified prior to collecting data. A specific emphasis will be given to the rating process and the associated morphometrics, the ultimate goal being to

  8. The lightest hybrid meson supermultiplet in QCD

    Energy Technology Data Exchange (ETDEWEB)

    Dudek, Jozef J

    2011-10-01

    We interpret the spectrum of meson states recently obtained in non-perturbative lattice QCD calculations in terms of constituent quark-antiquark bound states and states, called 'hybrids', in which the q{bar q} pair is supplemented by an excitation of the gluonic field. We identify a lightest supermultiplet of hybrid mesons with J{sup PC} = (0,1,2){sup {-+}}, 1{sup -} built from a gluonic excitation of chromomagnetic character coupled to q{bar q} in an S-wave. The next lightest hybrids are suggested to be quark orbital excitations with the same gluonic excitation, while the next distinct gluonic excitation is significantly heavier. Existing models of gluonic excitations are compared to these findings and possible phenomenological consequences explored.

  9. LHCb: LHCb results on $B$ meson mixing

    CERN Multimedia

    Eitschberger, U

    2013-01-01

    On the poster three LHCb results on B meson mixing using a datasample of 1 fb$^{-1}$ of $pp$ collisions at $\\sqrt{s} =$ 7 TeV are presented. The B meson oscillation frequencies are measured as $\\Delta m_d = 0.5156 \\pm 0.0051 (\\text{stat}) \\pm 0.0033 (\\text{syst}) \\text{ps}^{-1}$ and $\\Delta m_s = 17.768 \\pm 0.023 (\\text{stat}) \\pm 0.006 (\\text{syst}) \\text{ps}^{-1}$. The CP violation observables in the decay channel $B^0 \\rightarrow J/\\psi K^0_S$ are determined as $S_{J/\\psi K^0_S} = 0.73 \\pm 0.07 (\\text{stat})\\pm 0.04 (\\text{syst})$ and $C_{J/\\psi K^0_S} = 0.03 \\pm 0.09 (\\text{stat})\\pm 0.01 (\\text{syst})$.

  10. Exclusive electroproduction of $\\phi$ mesons at HERA

    CERN Document Server

    Chekanov, S; Adamczyk, L; Adamus, M; Adler, V; Aghuzumtsyan, G; Allfrey, P D; Antonioli, P; Antonov, A; Arneodo, M; Bailey, D S; Bamberger, A; Barakbaev, A N; Barbagli, G; Barbi, M; Bari, G; Barreiro, F; Bartsch, D; Basile, M; Behrens, U; Bell, M A; Bellagamba, L; Bellan, P M; Benen, A; Bertolin, A; Bhadra, S; Bloch, I; Bold, T; Boos, E G; Borras, K; Boscherini, D; Brock, I; Brook, N H; Brugnera, R; Brümmer, N; Bruni, A; Bruni, G; Bussey, P J; Butterworth, J M; Büttner, C; Bylsma, B; Caldwell, A; Capua, M; Cara Romeo, G; Carli, T; Carlin, R; Cassel, D G; Catterall, C D; Abramowicz, H; Chwastowski, J; Ciborowski, J; Ciesielski, R; Cifarelli, Luisa; Cindolo, F; Cole, J E; Collins-Tooth, C; Contin, A; Cooper-Sarkar, A M; Coppola, N; Corradi, M; Corriveau, F; Costa, M; Cottrell, A; Cui, Y; D'Agostini, G; Dal Corso, F; Danilov, P; De Pasquale, S; Dementiev, R K; Derrick, M; Devenish, R C E; Dhawan, S; Dobur, D; Dolgoshein, B A; Doyle, A T; Drews, G; Durkin, L S; Dusini, S; Eisenberg, Y; Ermolov, P F; Eskreys, Andrzej; Everett, A; Ferrando, J; Ferrero, M I; Figiel, J; Foster, B; Foudas, C; Fourletov, S; Fourletova, J; Fry, C; Gabareen, A; Galas, A; Gallo, E; Garfagnini, A; Geiser, A; Genta, C; Gialas, I; Giusti, P; Gladilin, L K; Gladkov, D; Glasman, C; Göbel, F; Goers, S; Goncalo, R; González, O; Gosau, T; Göttlicher, P; Grabowska-Bold, I; Graciani-Díaz, R; Grigorescu, G; Grijpink, S; Groys, M; Grzelak, G; Gutsche, O; Gwenlan, C; Haas, T; Hain, W; Hall-Wilton, R; Hamatsu, R; Hamilton, J; Hanlon, S; Hart, C; Hartmann, H; Hartner, G; Heaphy, E A; Heath, G P; Helbich, M; Hilger, E; Hochman, D; Holm, U; Horn, C; Iacobucci, G; Iga, Y; Irrgang, P; Jakob, H P; Jiménez, M; Jones, T W; Kagawa, S; Kahle, B; Kaji, H; Kananov, S; Karshon, U; Karstens, F; Kasemann, M; Kataoka, M; Katkov, I I; Kcira, D; Keramidas, A; Khein, L A; Kim, J Y; Kind, O; Kisielewska, D; Kitamura, S; Koffeman, E; Kohno, T; Kooijman, P; Koop, T; Korzhavina, I A; Kotanski, A; Kötz, U; Kowal, A M; Kowalski, H; Kramberger, G; Kreisel, A; Krumnack, N; Kulinski, P; Kuze, M; Kuzmin, V A; Labarga, L; Lammers, S; Lelas, D; Levchenko, B B; Levy, A; Li, L; Lightwood, M S; Lim, H; Limentani, S; Ling, T Y; Liu, C; Liu, X; Löhr, B; Lohrmann, E; Loizides, J H; Long, K R; Longhin, A; Lukasik, J; Lukina, O Yu; Luzniak, P; Ma, K J; Maddox, E; Magill, S; Malka, J; Mankel, R; Margotti, A; Marini, G; Martin, J F; Martínez, M; Mastroberardino, A; Matsuzawa, K; Mattingly, M C K; Melzer-Pellmann, I A; Menary, S R; Metlica, F; Meyer, U; Miglioranzi, S; Milite, M; Mirea, A; Monaco, V; Montanari, A; Musgrave, B; Nagano, K; Namsoo, T; Nania, R; Nguyen, C N; Nigro, A; Ning, Y; Noor, U; Notz, D; Nowak, R J; Nuncio-Quiroz, A E; Oh, B Y; Olkiewicz, K; Ota, O; Padhi, S; Palmonari, F; Patel, S; Paul, E; Pavel, Usan; Pawlak, J M; Pelfer, P G; Pellegrino, A; Pesci, A; Piotrzkowski, K; Plamondon, M; Plucinsky, P P; Pokrovskiy, N S; Polini, A; Proskuryakov, A S; Przybycien, M B; Rautenberg, J; Raval, A; Reeder, D D; Ren, Z; Renner, R; Repond, J; Ri, Y D; Rinaldi, L; Robins, S; Rosin, M; Ruspa, M; Ryan, P; Sacchi, R; Salehi, H; Santamarta, R; Sartorelli, G; Savin, A A; Saxon, D H; Schagen, S; Schioppa, M; Schlenstedt, S; Schleper, P; Schmidke, W B; Schneekloth, U; Schörner-Sadenius, T; Sciulli, F; Shcheglova, L M; Skillicorn, I O; Slominski, W; Smith, W H; Soares, M; Solano, A; Son, D; Sosnovtsev, V V; Stairs, D G; Stanco, L; Standage, J; Stifutkin, A; Stonjek, S; Stopa, P; Stösslein, U; Straub, P B; Suchkov, S; Susinno, G; Suszycki, L; Sutiak, J; Sutton, M R; Sztuk, J; Szuba, D; Szuba, J; Tapper, A D; Targett-Adams, C; Tassi, E; Tawara, T; Terron, J; Tiecke, H G; Tokushuku, K; Tsurugai, T; Turcato, M; Tymieniecka, T; Tyszkiewicz, A; Ukleja, A; Ukleja, J; Vázquez, M; Vlasov, N N; Voss, K C; Walczak, R; Walsh, R; Wang, M; Whitmore, J J; Whyte, J; Wichmann, K; Wick, K; Wiggers, L; Wills, H H; Wing, M; Wlasenko, M; Wolf, G; Yagues-Molina, A G; Yamada, S; Yamazaki, Y; Yoshida, R; Youngman, C; Zambrana, M; Zawiejski, L; Zeuner, W; Zhautykov, B O; Zhou, C; Zichichi, A; Ziegler, A; Zotkin, D S; Zotkin, S A; De Favereau, J; De Wolf, E; Del Peso, J

    2005-01-01

    Exclusive electroproduction of $\\phi$ mesons has been studied in $e^\\pm p$ collisions at $\\sqrt{s}=318 \\gev$ with the ZEUS detector at HERA using an integrated luminosity of 65.1 pb$^{-1}$. The $\\gamma^*p$ cross section is presented in the kinematic range $2mesons. The ratios $R$ of the cross sections for longitudinally and transversely polarized virtual photons are presented as functions of $Q^2$ and $W$. The data are also compared to predictions from theoretical models.

  11. Heavy meson spectroscopy under strong magnetic field

    CERN Document Server

    Yoshida, Tetsuya

    2016-01-01

    Spectra of the neutral heavy mesons, $\\eta_c(1S,2S)$, $J/psi$, $\\psi(2S)$, $\\eta_b(1S,2S,3S)$, $\\Upsilon(1S,2S,3S)$, $D$, $D^\\ast$, $B$, $B^\\ast$, $B_s$ and $B_s^\\ast$, in a homogeneous magnetic field are analyzed in a potential model of constituent quarks. To obtain anisotropic wave functions and the corresponding eigenvalues, the cylindrical Gaussian expansion method is applied, where the wave functions for transverse and longitudinal directions in the cylindrical coordinate are expanded by the Gaussian bases separately. Energy level structures in the wide range of magnetic field are obtained and the deformation of the wave functions is shown, which reflects effects of the spin mixing, the Zeeman splitting and quark Landau levels. The contribution from the magnetic catalysis in heavy-light mesons is discussed as a change of the light constituent quark mass.

  12. Vector mesons in strongly interacting matter

    Indian Academy of Sciences (India)

    Volker Metag

    2010-08-01

    Properties of hadrons in strongly interacting matter provide a link between quantum chromodynamics in the strong coupling regime and experimental observables. QCD sum rules show that changes in chiral and higher-order condensates, partially associated with a restoration of chiral symmetry in the nuclear medium, will lead to significant changes in the low-energy spectrum of hadrons. Heavy-ion collisions and reactions with elementary probes have been used to extract experimental information on in-medium properties of hadrons. Results on the light vector mesons ρ, , and , are summarized and compared. Almost all experiments report a softening of the spectral functions with increases in width depending on the density and temperature of the hadronic environment. No evidence for mass shifts is found in majority of the experiments. Remaining inconsistencies among experimental results demonstrate the need for further measurements with higher statistics and inrceased acceptance in particular for low-momentum vector mesons.

  13. Electroproduction of tensor mesons in QCD

    CERN Document Server

    Braun, V M; Strohmaier, M; Vladimirov, A A

    2016-01-01

    Due to multiple possible polarizations hard exclusive production of tensor mesons by virtual photons or in heavy meson decays offers interesting possibilities to study the helicity structure of the underlying short-distance process. Motivated by the first measurement of the transition form factor $\\gamma^*\\gamma \\to f_2(1270)$ at large momentum transfers by the BELLE collaboration we present an improved QCD analysis of this reaction in the framework of collinear factorization including contributions of twist-three quark-antiquark-gluon operators and an estimate of soft end-point corrections using light-cone sum rules. The results appear to be in a very good agreement with the data, in particular the predicted scaling behavior is reproduced in all cases.

  14. Nonequilibrium meson production in strong fields

    CERN Document Server

    Juchnowski, L; Fischer, T; Smolyansky, S A

    2015-01-01

    We develop a kinetic equation approach to nonequilibrium pion and sigma meson production in a time-dependent, chiral symmetry breaking field (inertial mechanism). We investigate the question to what extent the low-momentum pion enhancement observed in heavy-ion collisions at CERN - LHC can be addressed within this formalism. In a first step, we consider the inertial mechanism for nonequilibrium production of $\\sigma-$mesons and their simultaneous decay into pion pairs for two cases of $\\sigma$ mass evolution. The resulting pion distribution shows a strong low-momentum enhancement which can be approximated by a thermal Bose distribution with a chemical potential that appears as a trace of the nonequilibrium process of its production.

  15. Electroproduction of tensor mesons in QCD

    Science.gov (United States)

    Braun, V. M.; Kivel, N.; Strohmaier, M.; Vladimirov, A. A.

    2016-06-01

    Due to multiple possible polarizations hard exclusive production of tensor mesons by virtual photons or in heavy meson decays offers interesting possibilities to study the helicity structure of the underlying short-distance process. Motivated by the first measurement of the transition form factor γ∗γ → f 2(1270) at large momentum transfers by the BELLE collaboration we present an improved QCD analysis of this reaction in the framework of collinear factorization including contributions of twist-three quark-antiquark-gluon operators and an estimate of soft end-point corrections using light-cone sum rules. The results appear to be in good agreement with the data, in particular the predicted scaling behavior is reproduced in all cases.

  16. Rotational Spectra of the Baryons and Mesons

    CERN Document Server

    Akers, D

    2003-01-01

    An investigation of the rotational spectra of baryons and mesons is conducted. Diakonov, Petrov and Polyakov claimed that all light baryons are rotational excitations. A study of the history of particle physics indicates that the ideas of rotational spectra can be originally attributed to a constituent-quark (CQ) model as proposed by Mac Gregor. Later research advanced spin-orbit splitting in a deformed model as suggested by Bhaduri and others. In the present work, we show from current data that the rotational spectra of baryons and mesons are in agreement with the original claims of Mac Gregor: namely, the values for the rotational energies Erot of particles merge with those of nuclear rotational bands in light nuclei. It is also shown that particles of different isotopic spins are separated in mass by a 70 MeV quantum, which is related to the SU(3) decuplet mass spacing as originally proposed by Gell-Mann.

  17. QCD monopole and sigma meson coupling

    CERN Document Server

    Iwazaki, Aiichi

    2016-01-01

    Under the assumption of the Abelian dominance in QCD, we show that chiral condensate is locally present around a QCD monopole. The appearance of the chiral condensate around a GUT monopole was shown in the previous analysis of the Rubakov effect. We apply a similar analysis to the QCD monopole. It follows that the condensation of the monopole carrying the chiral condensate leads to the chiral symmetry breaking as well as quark confinement. To realize the result explicitly, we present a phenomenological linear sigma model coupled with the monopoles, in which the monopole condensation causes the chiral symmetry breaking as well as confinement. The monopoles are assumed to be described by a model of dual superconductor. We identify the monopoles with scalar isoscalar $f_0$ mesons with masses $1400\\sim 1700$ MeV as well as dual gauge fields with $h_1$ vector mesons with masses $\\sim 1500$MeV.

  18. Neutral-meson oscillations with torsion

    CERN Document Server

    Poplawski, Nikodem J

    2011-01-01

    We propose a simple mechanism that may explain the observed particle-antiparticle asymmetry in the Universe. In the Einstein-Cartan-Sciama-Kibble theory of gravity, the intrinsic spin of matter generates spacetime torsion. Classical Dirac fields in the presence of torsion obey the nonlinear Hehl-Datta equation which is asymmetric under a charge-conjugation transformation. Accordingly, at extremely high densities that existed in the very early Universe, fermions have higher effective masses than antifermions. As a result, a meson composed of a light quark and a heavy antiquark has a lower effective mass than its antiparticle. Neutral-meson oscillations in thermal equilibrium therefore favor the production of light quarks and heavy antiquarks, which may be related to baryogenesis.

  19. Meson exchange and neutral weak currents

    Energy Technology Data Exchange (ETDEWEB)

    Beck, D.H. [Univ. of Illinois, Urbana, IL (United States)

    1994-04-01

    Measurements of parity-violating electron scattering asymmetries to determine weak neutral currents in nuclei will be effected by the presence of meson exchange currents. Present low momentum transfer calculations, based on a flavor independent framework, show these effects to be small. In general, however, as the momentum transfer increases to values typical of deep-inelastic scattering, fragmentation functions show a clear flavor dependence. It is suggested that a good experimental starting point for understanding the flavor dependence of meson production and exchange currents is the Q{sup 2} dependence of parity-violating asymmetry in inclusive single pion electroproduction. A CEBAF facility with doubled energy is necessary to approach momentum transfers where this process begins to scale.

  20. Beauty physics at e+ e- colliders

    International Nuclear Information System (INIS)

    Beauty physics to be performed in the next decade at the resonances Y(4S) and Z0 are compared. Large similarities are found in the physics program and the reconstruction techniques of Z0 and asymmetric Y(4S) colliders. The physics potential of the latter is found to be superior at equal luminosity to a symmetric machine, provided a large enough boost (≥ 5). Z0 machines will probably be the main source of the rich BS0 physics during that period

  1. Beautiful and other heavy baryons revisited

    Energy Technology Data Exchange (ETDEWEB)

    Martin, A.; Richard, J.M.

    1987-02-19

    We discuss the mass range for the beautiful baryons ..lambda../sub b/, ..sigma../sub b/ and ..sigma../sub b//sup */ allowed by rigorous inequalities which are derived in the framework of potential models but have probably a broader domain of validity. We obtain at the same time lower bounds on the masses of other baryons. We also compare the numerical prediction of several explicit models. There are convergent indications towards a mass of about 5.6 GeV for the ..lambda../sub b/.

  2. Safe is beautiful{exclamation_point}

    Energy Technology Data Exchange (ETDEWEB)

    Codee, H.D.K. [COVRA N.V., Vlissingen (Netherlands)]. E-mail: hccovra@zeelandnet.nl

    2006-07-01

    In the Netherlands long-term (100y) storage of all waste types in above ground, engineered structures, is a basic element of the waste management system. This is not a 'wait-and-see' solution, because at the same time provisions are taken for the final disposal. Facilities for treatment and storage of low, medium and high-level waste are in operation. The facility for high-level waste was commissioned in 2003. This facility is not only a technical building but also a work of art. We show that we are proud on our work. SAFE = BEAUTIFUL{exclamation_point} (author)

  3. A Beautiful Blonde: a Nash coordination game

    OpenAIRE

    Anderson, Simon P.; Maxim Engers

    2002-01-01

    In a memorable scene from the …lm ”A Beautiful Mind,” John Nash explains to his friends how to direct their attentions to women in a bar. Game theorists who have seen the …lm point out that the proposed solution is not a Nash equilibrium. Here we determine the Nash equilibria to the attention game. The symmetric mixed strategy equilibrium has resembles a common property resource problem. It has perverse comparative static properties that are not borne out by experimental data. Finally, we dis...

  4. Does it pay to be beautiful?

    OpenAIRE

    SIERMINSKA Eva

    2015-01-01

    It is a well-established view amongst economists that good-looking people have a better chance of employment and can earn more than those who are less physically attractive. A “beauty premium” is particularly apparent in jobs where there is a productivity gain associated with good looks, though this is different for women and men, and varies across countries. People also sort into occupations according to the relative returns to their physical characteristics; good-looking people take jobs wh...

  5. Haiti. Beauty parlours and health promoters.

    Science.gov (United States)

    Hughes, H

    1990-04-01

    In the poor neighborhoods of the capital city of Port au Prince Haiti are 100s of brightly painted beauty parlors, displaying signs like "Femme Moderne, studio de beaute." They are popular and cheap; between 70 and 80% of the population use them. In the south of the city, a team of health promotion volunteers are turning some 64 beauty parlors into AIDS education and condom distribution centers with the help and cooperation of the owners. The majority of these beauty parlors are owned and run by women who cannot find work elsewhere, including many immigrants from the Dominican Republic. Some proprietors work as prostitutes in the evenings because they cannot survive on the earnings of the parlors. These proprietors are now becoming AIDS educators-- talking to customers, handing out leaflets and distributing free condoms. The team of young volunteers responsible for this education program belong to the Center for Haitian Social Services (CHASS); a nonprofit, voluntary organization set up in 1987 as a community response to the lack of government health and social services. A CHASS volunteer explains: "The beauty parlors were chosen as a focal point for reaching the population. To start with, 1 box of condoms was distributed every week, not the owners are distributing 3 or 4 boxes. We encourage them to keep a record of numbers taken, client's age, sex, marital status and so on." The majority of volunteer health promoters are ex-students who have given up their studies because of lack of funds. Many cannot find jobs, and they are encouraged to develop skills in their volunteer work which could help them find employment in the future. The team of volunteers meets every Saturday to discuss the program and training needs that arise. "At first the focus of our training was on AIDS, but now we need more information about other related issues." The most urgent need is to find out what local people's thoughts and understandings are about the disease. CHASS has designed a

  6. LAMPF: the meson factory. A LASL monograph

    Energy Technology Data Exchange (ETDEWEB)

    Allred, J.C.

    1977-08-01

    A general and simplified introduction to the entire concept of LAMPF is given in terms of its experimental capabilities. Parts of the current experimental program are used as illustrative examples. Topics discussed include: (1) the evolution of the meson factory; (2) accelerator construction; (3) strong focusing; (4) accelerator innovations at LAMPF; (5) photons and pions; (6) muons as nuclear probes; (7) nuclear chemistry; (8) radiobiology and medical applications; (9) radioisotope production; (10) materials testing; and (11) LAMPF management and users group. (PMA)

  7. Remarks on the exotic U-meson

    International Nuclear Information System (INIS)

    In expectation of imminent results from the new hyperon beam experiment at CERN concerning the exotic U-meson at 3.1 GeV, we propose a detailed program of experimental tests to check the suggestion that U is a qqq-barq-bar ''M-diquonium'' state. Apart from some very characteristic decay modes, the U is expected to occur together with several analogous states with various quantum numbers to which it is intimately related. (author)

  8. Mesonic spectroscopy of Minimal Walking Technicolor

    DEFF Research Database (Denmark)

    Del Debbio, Luigi; Lucini, Biagio; Patella, Agostino;

    2010-01-01

    We investigate the structure and the novel emerging features of the mesonic non-singlet spectrum of the Minimal Walking Technicolor (MWT) theory. Precision measurements in the nonsinglet pseudoscalar and vector channels are compared to the expectations for an IR-conformal field theory and a QCD-l......-like theory. Our results favor a scenario in which MWT is (almost) conformal in the infrared, while spontaneous chiral symmetry breaking seems less plausible....

  9. B meson physics and related new physics

    International Nuclear Information System (INIS)

    We have surveyed the some models focusing on the mixings, the CP violation and the rare decay in the B meson system. The ARGUS data of the Bd0-B-bard0 mixing gives us some constraints as to parameters of these models. Especially, we have investigated the composite scale in detail using the ARGUS data of the Bd0-B-bard0 mixing and obtained some interesting results. (author)

  10. Non-conventional mesons at PANDA

    Science.gov (United States)

    Giacosa, Francesco

    2015-04-01

    Non-conventional mesons, such as glueballs and tetraquarks, will be in the focus of the PANDA experiment at the FAIR facility. In this lecture we recall the basic properties of QCD and describe some features of unconventional states. We focus on the search of the not-yet discovered glueballs and the use of the extended Linear Sigma Model for this purpose, and on the already discovered but not-yet understood X, Y, Z states.

  11. Understanding the baryon and meson spectra

    Energy Technology Data Exchange (ETDEWEB)

    Pennington, Michael R. [JLAB

    2013-10-01

    A brief overview is given of what we know of the baryon and meson spectra, with a focus on what are the key internal degrees of freedom and how these relate to strong coupling QCD. The challenges, experimental, theoretical and phenomenological, for the future are outlined, with particular reference to a program at Jefferson Lab to extract hadronic states in which glue unambiguously contributes to their quantum numbers.

  12. Radiative widths of K and rho mesons

    International Nuclear Information System (INIS)

    The dissociation of K and π mesons in the nuclear Coulomb field has been studied. Results are: GAMMA(rho→πγ) = 67 +- 7 KeV., GAMMA(K*(890)→Kπ) = 60 +- 15 KeV; and the observation of Coulomb excitation of the following states: K*(1420,1700),A2,A1,B. The measured widths are in rough agreement with a simple quark model

  13. Vector meson contributions in ε'/ε

    International Nuclear Information System (INIS)

    The CP-violating parameter -bar '/-bar is computed using the low-energy dynamics of the chiral theory supplemented by vector resonances. The divergent contributions coming from strong π-π scattering are tamed by vector-meson exchange terms. This amounts to softening the fast growing high-energy behaviour of π-π scattering. The final result for ε'/ε shows a smooth dependence on the cut-off where low energy dynamics is matched with that of QCD

  14. Non-perturbative effects in heavy mesons

    International Nuclear Information System (INIS)

    The existence of a non-trivial vacuum has influences on bound states. We calculate its effects on heavy pseudoscalar mesons parameterizing the non-perturbative properties by gluon condensates and using a non-relativistic approximation. We derive and effective Hamiltonian taking into account the interaction with the gluonic vacuum. The background gauge formalism used preserves gauge invariance. Non-perturbative effects are shown to be more important in higher excited states. (author)

  15. Bubble chamber: D meson production and decay

    CERN Multimedia

    1978-01-01

    This event shows real particle tracks from the Big European Bubble Chamber (BEBC), which was used to observe neutrino and hadron beams between 1973 and 1984 from the PS and SPS accelerators. In this event a neutrino interacts with a proton producing an excited D meson. A labeled diagram is seen on the right as the particles spiral in the magnetic field of the detector.

  16. Leading logarithms for mesons and nucleons

    OpenAIRE

    Bijnens, Johan; Kampf, Karol; Vladimirov, Alexey

    2015-01-01

    This talk describes the work done in calculating leading logarithms in massive effective field theories. We discuss shortly leading logarithms in renormalizable theories and how they can be calculated using only one-loop calculations in effective field theories. The remainder of the talk discusses masses, decay constants, condensates and anomalous processes in mesonic effective field theories like Chiral Perturbation Theory and the expansion of the nucleon mass.

  17. Open charm and beauty production at HERA

    International Nuclear Information System (INIS)

    Selected new results from the H1 and ZEUS collaborations on ep interactions at 300-318 GeV centre-of-mass energy are presented. The full pre-upgrade integrated luminosity of HERA of 110 pb-1 is used. Charm cross sections are measured up to high values of xB and Q2 and are found to be well described by NLO QCD in the 3 flavour scheme. Orbitally excited D mesons are observed; radial excitations are searched for, but are not seen. The first b cross section measurement is confirmed with a lifetime based method, establishing the excess over NLO QCD. (author)

  18. The Aesthetics of Race versus the Beauty of Humanity.

    Science.gov (United States)

    Pontynen, Arthur

    2002-01-01

    Recommends rejecting race (an aesthetic concept) and returning to the apprehension, appreciation, and realization of beauty. Discusses aesthetics and racism, racism and postmodernism, and postmodernism and despair. Explains that recognition of the continuum from aesthetics to beauty would mark the demise of aesthetics and the rise of a new and…

  19. Transposons for cancer gene discovery: Sleeping Beauty and beyond

    OpenAIRE

    Collier, Lara S.; Largaespada, David A

    2007-01-01

    The use of Sleeping Beauty transposons as somatic mutagens to discover cancer genes in hematopoietic tumors and sarcomas has been documented. Here, we discuss the future of Sleeping Beauty for cancer genetic studies and the potential use of additional transposable elements for somatic mutagenesis.

  20. On the beauty of nature, paintings and music

    Directory of Open Access Journals (Sweden)

    Ekin Çoraklı

    2014-07-01

    Full Text Available There is a wide range of things that are classified by humans in terms of their level of beauty. The word ‘beautiful’ is used to define some of the natural entities living and nonliving, unnatural objects or ideas produced by humans, and the works of art, which are unique products of human hand and brain. Beauty, as a concept awakening a common feeling of pleasure, may mean something deeper than we are aware of. This meaning is perhaps hidden in its deeper aspects, which we have to give effort to analyze. Hence, within context of this paper, common and specific properties of the beauty of nature, paintings and music will be discussed. In addition, the stages of the perception of the beauty of all kinds will be called into question, and an account about the process of the judgment of beauty will be suggested. The specific types of beauty analyzed through the paper are limited with the beauty of nature, paintings and absolute music (music without words, following an opening remark about the beauty in general.

  1. Beauty: A Concept with Practical Implications for Teacher Researchers

    Science.gov (United States)

    Winston, Joe

    2011-01-01

    Hillman's (2001) simple affirmation that "an idea of beauty is useful, functional, practical" is one this article attempts to pursue with teacher researchers in mind, based on the belief that to move from the "re"pression of beauty to its "ex"pression--or, at the very least, to its articulation--will enlighten rather than distract individuals. The…

  2. Collider phenomenology of light strange-beauty squarks

    International Nuclear Information System (INIS)

    We summarize a study on the production, decay, and detection of the strange-beauty squark as light as 200 GeV at hadronic and e+e- colliders. It was motivated by nearly maximal mixing between strange and beauty squarks. (author)

  3. Gender Differences in the Motivational Processing of Facial Beauty

    Science.gov (United States)

    Levy, Boaz; Ariely, Dan; Mazar, Nina; Chi, Won; Lukas, Scott; Elman, Igor

    2008-01-01

    Gender may be involved in the motivational processing of facial beauty. This study applied a behavioral probe, known to activate brain motivational regions, to healthy heterosexual subjects. Matched samples of men and women were administered two tasks: (a) key pressing to change the viewing time of average or beautiful female or male facial…

  4. Appreciating the Beauty of Science Ideas: Teaching for Aesthetic Understanding.

    Science.gov (United States)

    Girod, Mark; Rau, Cheryl

    A large body of literature exists in which scientists describe their field as beautiful and the work they do as inspired and passionate. Science teaching should strive to foster learning of substantive and powerful science ideas in ways that connect to the beauty inherent in those ideas. The conception of learning science in the study, that of…

  5. Meson F1 spin and parity measurement

    International Nuclear Information System (INIS)

    Data of several series of antiproton-proton annihilation events produced at 1,1 to 2,04 GeV/c are analyzed. The meson resonances three-body disintegration (KantiKπ) and particularly the F1 meson of which quantum numbers spin and parity were not quite determinated, were studied. In the antiproton-proton reaction, it was possible to put into evidence the F1 meson existence. To test the spin, in this experiment were used the following processes: the 'angular correlation' test using the production of F1 associated with the omega as well as the desintegrations in series F1→K*K, K*→Kπ; the 'positivity' test which are directly bound to the positivity conditions of the F1 polarization density operator and use only F1→K*K desintegration. The coherence in the measures obtained in several independent tests allowed to conclude with a good experimental evidence that the spin-parity hypothesis Jsub(F1)sup(P)=2- is the most probable

  6. Leptonic Decays of Charged Pseudoscalar Mesons - 2015

    CERN Document Server

    Rosner, Jonathan L; Van de Water, Ruth S

    2015-01-01

    We review the physics of purely leptonic decays of $\\pi^\\pm$, $K^\\pm$, $D^{\\pm}$, $D_s^\\pm$, and $B^\\pm$ pseudoscalar mesons. The measured decay rates are related to the product of the relevant weak-interaction-based CKM matrix element of the constituent quarks and a strong interaction parameter related to the overlap of the quark and antiquark wave-functions in the meson, called the decay constant $f_P$. The leptonic decay constants for $\\pi^\\pm$, $K^\\pm$, $D^{\\pm}$, $D_s^\\pm$, and $B^\\pm$ mesons can be obtained with controlled theoretical uncertainties and high precision from {\\it ab initio} lattice-QCD simulations. The combination of experimental leptonic decay-rate measurements and theoretical decay-constant calculations enables the determination of several elements of the CKM matrix within the standard model. These determinations are competitive with those obtained from semileptonic decays, and also complementary because they are sensitive to different quark flavor-changing currents. They can also be use...

  7. Interaction of eta mesons with nuclei

    CERN Document Server

    Kelkar, N G; Upadhyay, N J; Jain, B K

    2013-01-01

    Back in the mid eighties, a new branch of investigation which was related to the interaction of eta mesons with nuclei came into existence. It started with the theoretical prediction of possible exotic states of eta mesons and nuclei bound by the strong interaction and later developed into an extensive experimental program to search for such unstable states as well as understand the underlying interaction via eta meson producing reactions. The vast literature of experimental as well as theoretical works which studied various aspects of eta producing reactions such as the $\\pi ^+$ $n$ $\\to \\eta p$, $p d \\to ^3$He $\\eta$, $p \\,^6$Li $\\to ^7$Be $\\eta$ and $\\gamma ^3$He $\\to \\eta$ X, to name a few, had but one objective in mind: to understand the eta - nucleon ($\\eta N$) and hence the $\\eta$-nucleus interaction which could explain the production data and confirm the existence of some $\\eta$-mesic nuclei. In spite of these efforts, there remain uncertainties in the knowledge of the $\\eta N$ and hence the $\\eta$-nu...

  8. Holographic Picture of Heavy Vector Meson Melting

    CERN Document Server

    Braga, Nelson R F; Diles, Saulo

    2016-01-01

    The fraction of heavy vector mesons produced in a heavy ion collision, as compared to a proton proton collision, serves as an important indication of the formation of a thermal medium, the quark gluon plasma. This sort of analysis strongly depends on understanding the thermal effects of a medium like the plasma on the states of heavy mesons. In particular, it is crucial to know the temperature ranges where they undergo a thermal dissociation, or melting. AdS/QCD models are know to provide an important tool for the calculation of hadronic masses, but in general are not consistent with the observation that decay constants of heavy vector mesons decrease with excitation level. It has recently been shown that this problem can be overcome using a soft wall background and introducing an extra energy parameter, through the calculation of correlation functions at a finite position of anti-de Sitter space. This approach leads to the evaluation of masses and decay constants of S wave quarkonium states with just one fla...

  9. QED effects in the pseudoscalar meson sector

    CERN Document Server

    Horsley, R; Perlt, H; Pleiter, D; Rakow, P E L; Schierholz, G; Schiller, A; Stokes, R; Stüben, H; Young, R D; Zanotti, J M

    2015-01-01

    We present results on the pseudoscalar meson masses from a fully dynamical simulation of QCD+QED. We concentrate particularly on violations of isospin symmetry. We calculate the $\\pi^+$-$\\pi^0$ splitting and also look at other isospin violating mass differences. We have presented results for these isospin splittings in arXiv:1508.06401 [hep-lat]. In this paper we give more details of the techniques employed, discussing in particular the question of how much of the symmetry violation is due to QCD, arising from the different masses of the $u$ and $d$ quarks, and how much is due to QED, arising from the different charges of the quarks. This decomposition is not unique, it depends on the renormalisation scheme and scale. We suggest a renormalisation scheme in which Dashen's theorem for neutral mesons holds, so that the electromagnetic self-energies of the neutral mesons are zero, and discuss how the self-energies change when we transform to a scheme such as $\\overline{MS}$, in which Dashen's theorem for neutral ...

  10. Rare decay of Bs0 and B0 mesons into dimuon (μ+μ-) using relativistic formalism

    International Nuclear Information System (INIS)

    Decays that are highly suppressed in the standard model are excellent places to search for effects of new physics. The rare decays Bs 0→μ+μ- are discovered from the CMS (Compact Muon Solenoid) and LHCb (Large Hadron Collider beauty) collaborations very recently. The decay of Bs0 and B0 mesons to two muons is forbidden at the elementary level because the Z0 cannot couple directly to quarks of different flavours and there are no direct flavour changing neutral currents (FCNC). However, this decay occurs through higher order transitions.These are highly suppressed because each additional interaction vertex reduces their probability of occurring significantly. They are also helicity and CKM suppressed. Consequently, the branching fraction for the Bs0 → (μ+μ- decay is expected to be very small compared to the dominant b antiquark to c antiquark transitions

  11. Onia, open heavy flavours, meson decays and combinatorial effects in muon pairs measurements, in ALICE at LHC

    International Nuclear Information System (INIS)

    The ALICE collaboration has proposed to build a detector dedicated to nucleus-nucleus collisions at LHC. The aim is to study strongly interacting matter at extreme energy densities and particularly to search for evidence of the predicted QCD phase transition to quark-gluon plasma (QGP). The suppression of heavy quark resonances, J/ψ and υ, is one of the most promising signatures of the quark-gluon plasma. This work gives out results of a simulation of signals and backgrounds in muon pairs measurements with a forward spectrometer, including the dimuon production from resonances, open charm, open beauty and meson decay in Pb-Pb, Ca-Ca and P-P collisions. The effect of the nature of the absorber on the mass resolution is discussed, and a comparison with measurement in the central region is also made. (author)

  12. The ARGUS experiment: Beauty (and charm) at DESY

    International Nuclear Information System (INIS)

    The ARGUS detector is described and results of some early measurements are given, including the mass of the Y meson, and the shape of the ππ mass spectrum in the decay Y -- ππY. Studies of the production and decay of charmed mesons from the continuum are described in detail

  13. Towards the understanding of 11p1 meson mass spectrum

    Institute of Scientific and Technical Information of China (English)

    Feng Xue-Chao; Jiang Feng-Chun; Chang Tong-Qin; Feng Jun-Lan

    2008-01-01

    Based on the meson-meson mixing and Regge trajectory, this paper establishes the mass relations which can describe the mass spectrum of 11P1 meson state. Using these mass relations, it obtains the mass of KIB, h1 (1380) and hc(1P) to be 1358.5MeV, 1468 MeV and 3543.9 MeV, respectively. The results axe compared with other theoretical results and should be tested by experiments in the future.

  14. A review of the open charm and open bottom mesons

    CERN Document Server

    Chen, Hua-Xing; Liu, Xiang; Liu, Yan-Rui; Zhu, Shi-Lin

    2016-01-01

    Since the discovery of the first charmed meson in 1976, many open-charm and open-bottom mesons were observed. In 2003 two narrow charm-strange states $D_{s0}^*(2317)$ and $D_{s1}(2460)$ were discovered by the BaBar and CLEO Collaborations, respectively. After that, more excited heavy mesons were reported. In this work, we review the experimental and theoretical progress in this field.

  15. Baryon to meson transition distribution amplitudes and their spectral representation

    CERN Document Server

    Pire, Bernard; Szymanowski, Lech

    2011-01-01

    We consider the problem of construction of a spectral representation for nucleon to meson transition distribution amplitudes (TDAs), non-diagonal matrix elements of nonlocal three quark light-cone operators between a nucleon and a meson states. We introduce the notion of quadruple distributions and generalize Radyshkin's factorized Ansatz for this issue. Modelling of baryon to meson TDAs in the complete domain of their definition opens the way to quantitative estimates of cross-sections for various hard exclusive reactions.

  16. Open flavour charmed mesons in a quantum chromodynamics potential model

    Indian Academy of Sciences (India)

    Krishna Kingkar Pathak; D K Choudhury

    2012-12-01

    We modify the mesonic wave function by using a short distance scale 0 in analogy with hydrogen atom and estimate the values of masses and decay constants of the open flavour charm mesons , $D_{s}$ and $B_{c}$ within the framework of a QCD potential model. We also calculate leptonic decay widths of these mesons to study branching ratios and lifetime. The results are in good agreement with experimental and other theoretical values.

  17. The Effects of δ Meson on the Neutron Star Cooling

    Institute of Scientific and Technical Information of China (English)

    许妍; 刘广洲; 吴姚睿; 朱明枫; 喻孜; 王红岩; 赵恩广

    2012-01-01

    In the framework of the relativistic mean field theory, the isovector scalar interaction is considered by exchanging δ meson to study the influence of δ meson on the cooling properties of neutron star matter. The calculation results show that with the inclusion of δ meson, the neutrino emissivity of the direct Urca processes increases, and thus enhances the cooling of neutron star matter. When strong proton superfluidity is considered, the theoretical cooling curves agree with the observed thermal radiation for isolated neutron stars.

  18. Chiral phase transition scenarios from the vector meson extended Polyakov quark meson model

    CERN Document Server

    Kovács, Péter

    2015-01-01

    Chiral phase transition is investigated in an $SU(3)_L \\times SU(3)_R$ symmetric vector meson extended linear sigma model with additional constituent quarks and Polyakov loops (extended Polyakov quark meson model). The parameterization of the Lagrangian is done at zero temperature in a hybrid approach, where the mesons are treated at tree-level, while the constituent quarks at 1-loop level. The temperature and baryochemical potential dependence of the two assumed scalar condensates are calculated from the hybrid 1-loop level equations of states. The order of the phase transition along the $T=0$ and $\\mu_B=0$ axes are determined for various parameterization scenarios. We find that in order to have a first order phase transition at $T=0$ as a function of $\\mu_B$ a light isoscalar particle is needed.

  19. The experience of mathematical beauty and its neural correlates

    Directory of Open Access Journals (Sweden)

    Semir eZeki

    2014-02-01

    Full Text Available Many have written of the experience of mathematical beauty as being comparable to that derived from the greatest art. This makes it interesting to learn whether the experience of beauty derived from such a highly intellectual and abstract source such as mathematics correlates with activity in the same part of the emotional brain as that derived from more sensory, perceptually based, sources. To determine this, we used functional magnetic resonance imaging (fMRI to image the activity in the brains of 15 mathematicians when they viewed mathematical formulae which they had individually rated as beautiful, indifferent or ugly. Results showed that the experience of mathematical beauty correlates parametrically with activity in the same part of the emotional brain, namely field A1 of the medial orbito-frontal cortex (mOFC, as the experience of beauty derived from other sources.

  20. The experience of mathematical beauty and its neural correlates.

    Science.gov (United States)

    Zeki, Semir; Romaya, John Paul; Benincasa, Dionigi M T; Atiyah, Michael F

    2014-01-01

    Many have written of the experience of mathematical beauty as being comparable to that derived from the greatest art. This makes it interesting to learn whether the experience of beauty derived from such a highly intellectual and abstract source as mathematics correlates with activity in the same part of the emotional brain as that derived from more sensory, perceptually based, sources. To determine this, we used functional magnetic resonance imaging (fMRI) to image the activity in the brains of 15 mathematicians when they viewed mathematical formulae which they had individually rated as beautiful, indifferent or ugly. Results showed that the experience of mathematical beauty correlates parametrically with activity in the same part of the emotional brain, namely field A1 of the medial orbito-frontal cortex (mOFC), as the experience of beauty derived from other sources.