WorldWideScience

Sample records for antikaons

  1. Antikaons in infinite nuclear matter and nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Moeller, M.

    2007-12-10

    In this work we studied the properties of antikaons and hyperons in infinite cold nuclear matter. The in-medium antikaon-nucleon scattering amplitude and self-energy has been calculated within a covariant many-body framework in the first part. Nuclear saturation effects have been taken into account in terms of scalar and vector nucleon mean-fields. In the second part of the work we introduced a non-local method for the description of kaonic atoms. The many-body approach of anti KN scattering can be tested by the application to kaonic atoms. A self-consistent and covariant many-body approach has been used for the determination of the antikaon spectral function and anti KN scattering amplitudes. It considers s-, p- and d-waves and the application of an in-medium projector algebra accounts for proper mixing of partial waves in the medium. The on-shell reduction scheme is also implemented by means of the projector algebra. The Bethe-Salpeter equation has been rewritten, so that the free-space anti KN scattering can be used as the interaction kernel for the in-medium scattering equation. The latter free-space scattering is based on a realistic coupled-channel dynamics and chiral SU(3) Lagrangian. Our many-body approach is generalized for the presence of large scalar and vector nucleon mean-fields. It is supplemented by an improved renormalization scheme, that systematically avoids the occurrence of medium-induced power-divergent structures and kinematical singularities. A modified projector basis has been introduced, that allows for a convenient inclusion of nucleon mean-fields. The description of the results in terms of the 'physical' basis is done with the help of a recoupling scheme based on the projector algebra properties. (orig.)

  2. Three-Body Antikaon-Nucleon Systems

    Czech Academy of Sciences Publication Activity Database

    Shevchenko, Nina V.

    2017-01-01

    Roč. 58, č. 1 (2017), č. článku UNSP 6. ISSN 0177-7963 R&D Projects: GA ČR(CZ) GA15-04301S Institutional support: RVO:61389005 Keywords : three-body * antikaon-nucleon * K p interactions Subject RIV: BE - Theoretical Physics OBOR OECD: Atom ic, molecular and chemical physics (physics of atom s and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) Impact factor: 0.877, year: 2016

  3. New computational methods for determining antikaon-nucleus bound states

    International Nuclear Information System (INIS)

    Fink, P.J. Jr.

    1989-01-01

    Optical potential for antikaon-nucleus strong interactions are constructed using elementary antikaon-nucleus potentials determined previously. The optical potentials are used to determine the existence of a kaon hypernucleus. Modern three dimensional visualization techniques are used to study model dependences, new methods for speeding the calculation of the optical potential are developed, and previous approximation to avoid full Fermi averaging are eliminated. 19 refs., 21 figs., 3 tabs

  4. Bose–Einstein condensation of anti-kaons and neutron star twins

    Indian Academy of Sciences (India)

    We investigate the role of Bose–Einstein condensation (BEC) of anti-kaons on the equation of state (EoS) and other properties of compact stars. In the framework of relativistic mean field model we determine the EoS for -stable hyperon matter and compare it to the situation when anti-kaons condense in the system.

  5. The influence of antikaon condensations on nucleon 1S0 superfluidity in neutron star matter

    Science.gov (United States)

    Xu, Yan; Huang, Xiu Lin; Zhang, Xiao Jun; Yu, Zi; Fan, Cun Bo; Ding, Wen Bo; Liu, Cheng Zhi

    2018-03-01

    The properties of neutron and proton 1S0 superfluidity are studied within the relativistic mean field and the Bardeen-Cooper-Schrieffer theories by taking the effects of K- and \\bar{K}0 condensations into account in neutron star matter without the hyperon degrees of freedom. It is found that antikaon condensations change the Fermi momenta, the effective masses and the single particle energies of nucleons in neutron star matter. These changes lead to a strong suppression of the neutron 1S0 superfluidity and an obvious enhancement of the proton 1S0 superfluidity in neutron star matter, respectively. In particular, the neutron and proton 1S0 pairing gaps are gradually shrinking with the optical potential of antikaons from -80 to -130 MeV. And antikaon condensations have little influence on the neutron 1S0 superfluid range, however, they have been markedly downsized the proton 1S0 superfluid range as the deepening of the optical potential of antikaons in neutron star matter. We also found that the nucleon 1S0 superfluidity and K- condensations within the scope of above optical potential of antikaons can occur in the core of PSR J1614-2230 and PSR J0348+0432 at the same time. Whereas \\bar{K}0 condensations only occur in the two pulsars when the range of optical potential of antikaons is from -100 to -130 MeV.

  6. Bose–Einstein condensation of anti-kaons and neutron star twins

    Indian Academy of Sciences (India)

    kaons on the equa- tion of state (EoS) and other properties of compact stars. In the framework of relativistic mean field model we determine the EoS for β-stable hyperon matter and compare it to the situation when anti-kaons condense in the ...

  7. Self consistent propagation of hyperons and antikaons in nuclear matter based on relativistic chiral SU(3) dynamics

    International Nuclear Information System (INIS)

    Lutz, M.F.M.; Korpa, C.L.

    2001-05-01

    We evaluate the antikaon spectral density in isospin symmetric nuclear matter. The in-medium antikaon-nucleon scattering process and the antikaon propagation is treated in a self consistent and relativistic manner where a maximally scheme-independent formulation is derived by performing a partial density resummation in terms of the free-space antikaon-nucleon scattering amplitudes. The latter amplitudes are taken from a relativistic and chiral coupled-channel SU(3) approach which includes s-, p- and d-waves systematically. Particular care is taken on the proper evaluation of the in-medium mixing of the partial waves. Our analysis establishes a rich structure of the antikaon spectral function with considerable strength at small energies. At nuclear saturation density we predict attractive mass shifts for the Λ(1405), Σ(1385) and Λ(1520) of about 130 MeV, 60 MeV and 100 MeV respectively. The hyperon states are found to exhibit at the same time an increased decay width of about 150 MeV for the s-wave Λ(1405), 70 MeV for the p-wave Σ(1385) and 100 MeV for the d-wave Λ(1520) resonance. (orig.)

  8. Inclusive K*- (890) and antikaon neutral* (890) production in 14.3GeV/c K-p interactions

    International Nuclear Information System (INIS)

    Paler, K.; Tovey, S.N.; Shah, T.P.; Phelan, J.J.; Miller, R.J.

    1975-01-01

    Results of the inclusive reactions K - p→K* - (890) + X + and K - p→antikaon neutral* (890) + X 0 at 14.3GeV/c are presented. A comparison is made with previous data and with the reaction K - p→antikaon neutral + X at 14.3GeV/c. Predictions of a Tripple Regge model for the variation of the unnatural and natural parity exchanges with the mass of the X system are examined. The experimental values of the structure functions are compared with those calculated from a Quark Model [fr

  9. Low-energy antikaon-nuclei interactions studies by AMADEUS: from QCD with strangeness to neutron stars

    Science.gov (United States)

    Piscicchia, K.; Curceanu, C.; Cargnelli, M.; Del Grande, R.; Fabbietti, L.; Marton, J.; Scordo, A.; Sirghi, D.; Tucakovic, I.; Vazquez Doce, O.; Wycech, S.; Zmeskal, J.; Mandaglio, G.; Martini, M.; Moskal, P.

    2018-01-01

    The AMADEUS collaboration aims to provide unique quality results from K- hadronic interactions in light nuclear targets, in order to solve fundamental open questions in the non-perturbative strangeness QCD sector, like the controversial nature of the Λ(1405) state, the yield of hyperon formation below threshold, the yield and shape of multi-nucleon K- absorption, processes which are intimately connected to the possible existence of exotic antikaon multi-nucleon clusters and to the role of strangeness in neutron stars. AMADEUS takes advantage of the DAΦNE collider, which provides a unique source of monochromatic low-momentum kaons and exploits the KLOE detector as an active target, in order to obtain excellent acceptance and resolution data for K- nuclear capture on H, 4He, 9Be and 12C, both at-rest and in-flight.

  10. Recoil corrections in antikaon-deuteron scattering

    Directory of Open Access Journals (Sweden)

    Mai Maxim

    2016-01-01

    Full Text Available Using the non-relativistic effective field theory approach for K−d scattering, it is demonstrated that a systematic perturbative expansion of the recoil corrections in the parameter ξ = MK/mN is possible in spite of the fact that K−d scattering at low energies is inherently non-perturbative due to the large values of the K̄N scattering lengths. The first order correction to the K−d scattering length due to single insertion of the retardation term in the multiple-scattering series is calculated. The recoil effect turns out to be reasonably small even at the physical value of MK/mN ≃ 0:5.

  11. Faddeev calculations of the (K)over-bar N N system with a chirally motivated (K)over-bar N interaction. I. Low-energy K (-) d scattering and antikaonic deuterium

    Czech Academy of Sciences Publication Activity Database

    Shevchenko, Nina V.; Revai, J.

    2014-01-01

    Roč. 90, č. 3 (2014), 034003 ISSN 0556-2813 R&D Projects: GA ČR(CZ) GAP203/12/2126; GA MŠk LG14038 Institutional support: RVO:61389005 Keywords : Faddeev calculations * kaonic hydrogen * X-rays Subject RIV: BE - Theoretical Physics Impact factor: 3.733, year: 2014

  12. Are there any narrow K--nuclear states?

    Czech Academy of Sciences Publication Activity Database

    Hrtánková, Jaroslava; Mareš, Jiří

    2017-01-01

    Roč. 770, JUL (2017), s. 342-347 ISSN 0370-2693 R&D Projects: GA ČR(CZ) GA15-04301S Institutional support: RVO:61389005 Keywords : antikaon-nucleus interaction * antikaon annihilation * kaonic nuclear bound states Subject RIV: BE - Theoretical Physics OBOR OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) Impact factor: 4.807, year: 2016

  13. Journal of Astrophysics and Astronomy | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Mass, radius and moment of inertia are direct probes of compositions and Equation of State (EoS) of dense matter in neutron star interior. These are computed for novel phases of dense matter involving hyperons and antikaon condensate and their observable consequences are discussed in this article. Furthermore, the ...

  14. Dense matter in strong gravitational field of neutron star

    Indian Academy of Sciences (India)

    Sajad A. Bhat

    2018-02-10

    Feb 10, 2018 ... Abstract. Mass, radius and moment of inertia are direct probes of compositions and Equation of State (EoS) of dense matter in neutron star interior. These are computed for novel phases of dense matter involving hyperons and antikaon condensate and their observable consequences are discussed in this ...

  15. Hadrons in compact stars

    Indian Academy of Sciences (India)

    We discuss -equilibrated and charge neutral matter involving hyperons and K ¯ condensates within relativistic models. It is observed that populations of baryons are strongly affected by the presence of antikaon condensates. Also, the equation of state including K ¯ condensates becomes softer resulting in a smaller ...

  16. Calculations of K- nuclear quasi-bound states based on chiral meson-baryon amplitudes

    Czech Academy of Sciences Publication Activity Database

    Gazda, Daniel; Mareš, Jiří

    2012-01-01

    Roč. 881, 5/6 (2012), s. 159-168 ISSN 0375-9474 R&D Projects: GA MŠk(CZ) LG11005 Institutional support: RVO:61389005 Keywords : K- nuclear states * mesic nuclei * antikaon-nucleus interaction Subject RIV: BE - Theoretical Physics Impact factor: 1.525, year: 2012

  17. On the pole content of coupled channels chiral approaches used for the (K)over-barN system

    Czech Academy of Sciences Publication Activity Database

    Cieplý, Aleš; Mai, M.; Meissner, Ulf-G.; Smejkal, J.

    2016-01-01

    Roč. 954, OCT (2016), s. 17-40 ISSN 0375-9474 R&D Projects: GA ČR(CZ) GA15-04301S Institutional support: RVO:61389005 Keywords : chiral dynamics * antikaon-nucleon interaction * bayron resonances Subject RIV: BE - Theoretical Physics Impact factor: 1.916, year: 2016

  18. Near-threshold K(-)d scattering and propertiies of kaonic deuterium

    Czech Academy of Sciences Publication Activity Database

    Shevchenko, Nina V.

    2012-01-01

    Roč. 890, OCT 1 (2012), s. 50-61 ISSN 0375-9474 R&D Projects: GA ČR(CZ) GAP203/12/2126 Institutional support: RVO:61389005 Keywords : Mesonic atom * Antikaon-nucleon interaction * Scattering length * Few-body equations Subject RIV: BE - Theoretical Physics Impact factor: 1.525, year: 2012

  19. Strong interaction studies with kaonic atoms

    Directory of Open Access Journals (Sweden)

    Marton J.

    2016-01-01

    Full Text Available The strong interaction of antikaons (K− with nucleons and nuclei in the low-energy regime represents an active research field connected intrinsically with few-body physics. There are important open questions like the question of antikaon nuclear bound states - the prototype system being K−pp. A unique and rather direct experimental access to the antikaon-nucleon scattering lengths is provided by precision X-ray spectroscopy of transitions in low-lying states of light kaonic atoms like kaonic hydrogen isotopes. In the SIDDHARTA experiment at the electron-positron collider DAΦNE of LNF-INFN we measured the most precise values of the strong interaction observables, i.e. the strong interaction on the 1s ground state of the electromagnetically bound K−p atom leading to a hadronic shift ϵ1s and a hadronic broadening Γ1s of the 1s state. The SIDDHARTA result triggered new theoretical work which achieved major progress in the understanding of the low-energy strong interaction with strangeness. Antikaon-nucleon scattering lengths have been calculated constrained by the SIDDHARTA data on kaonic hydrogen. For the extraction of the isospin-dependent scattering lengths a measurement of the hadronic shift and width of kaonic deuterium is necessary. Therefore, new X-ray studies with the focus on kaonic deuterium are in preparation (SIDDHARTA2. Many improvements in the experimental setup will allow to measure kaonic deuterium which is challenging due to the anticipated low X-ray yield. Especially important are the data on the X-ray yields of kaonic deuterium extracted from a exploratory experiment within SIDDHARTA.

  20. COUPLED-CHANNELS FADDEEV CALCULATION OF THE K(-) d SCATTERING LENGTH

    Czech Academy of Sciences Publication Activity Database

    Shevchenko, Nina V.

    2011-01-01

    Roč. 26, 3-4 (2011), s. 558-560 ISSN 0217-751X. [11th International Workshop on Meson Production , Properties and Interaction. Krakow, 10.06.2010-15.06.2010] R&D Projects: GA AV ČR KJB100480801 Institutional research plan: CEZ:AV0Z10480505 Keywords : Few-body systems * multichannel scattering * antikaon-baryon interaction Subject RIV: BF - Elementary Particles and High Energy Physics Impact factor: 1.053, year: 2011

  1. Deep sub-threshold phi production in Au plus Au collisions

    Czech Academy of Sciences Publication Activity Database

    Adamczewski-Musch, J.; Arnold, O.; Behnke, C.; Chlad, Lukáš; Kugler, Andrej; Rodriguez Ramos, Pablo; Sobolev, Yuri, G.; Svoboda, Ondřej; Tlustý, Pavel; Wagner, Vladimír

    2018-01-01

    Roč. 778, č. 3 (2018), s. 403-407 ISSN 0370-2693 R&D Projects: GA ČR GA13-06759S; GA MŠk LM2015049 Institutional support: RVO:61389005 Keywords : heavy ion collisions * antikaon production * meson production Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics OBOR OECD: Particles and field physics Impact factor: 4.807, year: 2016

  2. Few-body approach to the structure of K ¯-nuclear quasibound states

    Science.gov (United States)

    Ohnishi, Shota; Horiuchi, Wataru; Hoshino, Tsubasa; Miyahara, Kenta; Hyodo, Tetsuo

    2017-06-01

    The structure of light antikaon-nuclear quasibound states, which consist of an antikaon (K ¯=K-,K¯0) and a few nucleons (N =p ,n ) , such as K ¯N N , K ¯N N N , K ¯N N N N , and K ¯N N N N N N systems, is studied with full three- to seven-body calculations. Employing a realistic K ¯N potential based on the chiral SU(3) effective field theory with the SIDDHARTA constraint, we show that the central nucleon densities of these systems increase when the antikaon is injected, by about factor of 2 at maximum. The K ¯N N N N system shows the largest central density, about 0.74 fm-3 even with the phenomenological K ¯N potential, which is not as high as those suggested in previous studies with approximate treatments of the few-body systems. We find that the spin of the ground state of the K ¯N N N N N N system depends on the strength of the K ¯N attraction. Thus, the quantum number of the ground state can be another constraint on the K ¯N interaction.

  3. Strangeness at SIS energies

    Energy Technology Data Exchange (ETDEWEB)

    Koch, Volker

    2005-09-28

    In this contribution the authors discuss the physics of strange hadrons in low energy ({approx_equal} 1-2 AGeV) heavy ion collision. In this energy range the relevant strange particle are the kaons and anti-kaons. The most interesting aspect concerning these particles are so called in-medium modifications. They will attempt to review the current status of understanding of these in medium modifications. In addition they briefly discuss other issues related with kaon production, such as the nuclear equation of state and chemical equilibrium.

  4. New boundaries for the “ppK−” production in p+p collisions

    Directory of Open Access Journals (Sweden)

    Epple Eliane

    2014-01-01

    Full Text Available The HADES collaboration has searched for the anti-kaonic nuclear cluster “ppK−” in p+p collisions by its decay into pΛ. In the course of this analysis several cross checks had to be performed. This report discusses two examples thereof. In one test it was checked whether the presence of background events could introduce a bias on the applied partial wave analysis. The second item discussed here is the extraction of the total pK+Λ production cross section necessary to derive the absolute upper limit on the “ppK−” production cross section.

  5. Azimuthal angular distributions of K+ and K- mesons from Au+Au collisions at a kinetic beam energy of 1.5 AGeV

    International Nuclear Information System (INIS)

    Ploskon, M.

    2005-01-01

    The Kaon-Spectrometer (KaoS) at the heavy-ion synchrotron (SIS) at the Gesellschaft fuer Schwerionenforschung (GSI) in Darmstadt has been used to study production and propagation of K + and K - mesons from Au+Au collisions at a kinetic beam energy of 1.5 AGeV. The azimuthal angular distributions of particles as a function of the collision centrality and particle transverse momenta have been measured. We found a dependence of the K - meson azimuthal emission pattern on the transverse momentum. The antikaons registered with p t t > 0.5 GeV/c show strong out-of-plane enhancement. The emission patterns of K - can be explained in terms of two competing phenomena: one of them is indeed the influence of the attractive K - N potential, however, the second one originates from the strangeness-exchange process. (orig.)

  6. New trends in few-body systems a 30th anniversary collection

    CERN Document Server

    2017-01-01

    Few-Body Systems refer to a multidisciplinary subject of research in different sectors of physics in which the number of degrees of freedom governing the dynamics is sufficiently low to allow a description with controlled approximations. Examples can be found in atomic, nuclear and subnuclear physics as well as in some aspects of condensed matter. This issue, celebrating the 30th Anniversary of the Journal, contains two review articles, one in exotic hadrons and one in antikaon-nucleon systems, as well as a selection of original articles on experimental and theoretical physics in which modern problems in few-body systems are discussed. Specific arguments, presented by world expert leaders, are very extensive and include the three and four-nucleon system, short-range correlations, universal behavior in few-boson systems, perspectives on the origin of hadron masses, scattering problems and studies using electromagnetic probes. This issue gives an overview of actual problems in Few-Body Systems.

  7. Golden Jubilee photos: LEAR

    CERN Multimedia

    2004-01-01

    Extraction lines that carried the antiprotons from LEAR to the experiments. Beam-splitters and a multitude of beam-lines allowed several users to be supplied simultaneously. Particle physicists don't always need ever more powerful accelerators to study interesting physics. LEAR, the Low Energy Antiproton Ring, was designed to help explore the properties of antimatter, with the annihilation of protons and antiprotons becoming the main theme. LEAR was commissioned in 1983 and contributed to more than 30 experiments with great success. LEAR took part in the discovery of a 'glueball', a particle composed entirely of gluons, the carriers of the strong nuclear force. LEAR also observed that neutral kaons and antikaons decay at a slightly different rate, offering physicists another insight into the mystery about why matter prevails over antimatter in the Universe. Uniquely, LEAR combined both the electron and stochastic beam cooling techniques, used to control and refine the beams. It also pioneered a technique usin...

  8. Joint annual report 1984

    International Nuclear Information System (INIS)

    Hennig, K.

    1985-06-01

    An account is given on the activities in nuclear and solid state physcis. In the field of relativistic nuclear physcis first measurements at the Synchrophasotron of the JINR Dubna are presented. Nuclear reactions with heavy ions have been investigated at the cyclotron U-300 of the JINR. Studies of few-nucleon problems and measurements of fission cross sections at the tandem accelerator at Rossendorf have been continued. High spin states in transition nuclei (A approximately 80) and semimagic nuclei have been studied. Works in nuclear theory comprise heavy ion physics, plasma transitions in hot nuclear matter, antikaon production, hypernuclei and deformed nuclei, the time-dependent Hartree-Fock method, meson exchange, and new aspects of shell models. Various studies in solid state physics are presented, including the following: high-dose implantation in metals and semiconductors, tempering in semiconductor materials, light pulse annealing in Si, neutron diffraction in texture analysis, application of Si in the field of sensor technology

  9. Moment of inertia, quadrupole moment, Love number of neutron star and their relations with strange-matter equations of state

    Science.gov (United States)

    Bandyopadhyay, Debades; Bhat, Sajad A.; Char, Prasanta; Chatterjee, Debarati

    2018-02-01

    We investigate the impact of strange-matter equations of state involving Λ hyperons, Bose-Einstein condensate of K- mesons and first-order hadron-quark phase transition on moment of inertia, quadrupole moment and tidal deformability parameter of slowly rotating neutron stars. All these equations of state are compatible with the 2 M_{solar} constraint. The main findings of this investigation are the universality of the I- Q and I -Love number relations, which are preserved by the EoSs including Λ hyperons and antikaon condensates, but broken in the presence of a first-order hadron-quark phase transition. Furthermore, it is also noted that the quadrupole moment approaches the Kerr value of a black hole for maximum-mass neutron stars.

  10. Lifetime of kaonium

    International Nuclear Information System (INIS)

    Krewald, S.; Lemmer, R.H.; Sassen, F.P.

    2004-01-01

    The kaon-antikaon system is studied in both the atomic and the strongly interacting sector. We discuss the influence of the structures of the f 0 (980) and the a 0 (980) mesons on the lifetime of kaonium. The strong interactions are generated by vector meson exchange within the framework of the standard SU(3) V xSU(3) A invariant effective Lagrangian. In the atomic sector, the energy levels and decay widths of kaonium are determined by an eigenvalue equation of the Kudryavtsev-Popov type, with the strong interaction effects entering through the complex scattering length for KK-bar scattering and annihilation. The presence of two scalar mesons f 0 (980) and a 0 (980) leads to a ground state energy for the kaonium atom that is shifted above the point Coulomb value by a few hundred eV. The effect on the lifetime for the kaonium decay into two pions is much more dramatic. This lifetime is reduced by two orders of magnitude from 1.2x10 -16 sec for annihilation in a pure Coulomb field down to 3.2x10 -18 sec when the strong interactions are included. The analysis of the two photon decay width of the f 0 (980) suggests a generalization of the molecular picture which reduces the lifetime of kaonium still further to 1.1x10 -18 sec

  11. Kaon-nucleon scattering to one-loop order in heavy baryon chiral perturbation theory

    Science.gov (United States)

    Huang, Bo-Lin; Li, Yun-De

    2015-12-01

    We calculate the T matrices of kaon-nucleon (K N ) and antikaon-nucleon (K ¯N ) scattering to one-loop order in SU(3) heavy baryon chiral perturbation theory (HB χ PT ). The low-energy constants (LECs) and their combinations are then determined by fitting the phase shifts of K N scattering and the corresponding data. This leads to a good description of the phase shifts below 200 MeV kaon laboratory momentum. We obtain the LEC uncertainties through statistical regression analysis and successfully reduce one parameter. We also determine the LECs through the use of scattering lengths in order to check the consistency of the HB χ PT framework for different observables and obtain a consistent result. By using these LECs, we predict the K ¯N elastic scattering phase shifts and obtain reasonable results. The scattering lengths are also predicted, which turn out to be in good agreement with the empirical values except for the isospin-0 K ¯N scattering length that is strongly affected by the Λ (1405 ) resonance. As most calculations in the chiral perturbation theory, the convergence issue is discussed in detail. Our calculations provide a possibility to investigate the baryon-baryon interaction in HB χ PT .

  12. High-density kaonic-proton matter (KPM composed of Λ⁎≡K−p multiplets and its astrophysical connections

    Directory of Open Access Journals (Sweden)

    Yoshinori Akaishi

    2017-11-01

    Full Text Available We propose and examine a new form of high-density neutral composite of Λ⁎≡K−p=(su¯⊗(uud, which may be called anti-Kaonic Proton Matter (KPM, or simply, Λ⁎-Matter, where substantial shrinkage of baryonic bound systems originating from the strong attraction of the (K¯NI=0 interaction takes place, providing a ground-state neutral baryonic system with a large energy gap. The mass of an ensemble of (K−pm, where m, the number of the K−p pair, becomes larger than m≈10, is predicted to drop down below that of its corresponding neutron ensemble, (nm, since the attractive interaction is further increased by the Heitler–London type molecular covalency as well as by chiral symmetry restoration of the QCD vacuum. Since the seed clusters (K−p, K−pp and K−K−pp are short-lived, the formation of such a stabilized relic ensemble, (K−pm, may be conceived during the Big-Bang Quark Gluon Plasma (QGP period in the early universe. At the final stage of baryogenesis a substantial amount of primordial (u¯,d¯'s are transferred and captured into KPM, where the anti-quarks find places to survive forever. The expected KPM state may be cold, dense and neutral q¯q-hybrid (Quark Gluon Bound (QGB states, [s(u¯⊗uud]m, to which the relic of the disappearing anti-quarks plays an essential role as hidden components. KPM may also be produced during the formation and decay of neutron stars in connections with supernova explosions, and other forms may exist as strange quark matter in cosmic dusts.

  13. High-density kaonic-proton matter (KPM) composed of Λ* ≡ K-p multiplets and its astrophysical connections

    Science.gov (United States)

    Akaishi, Yoshinori; Yamazaki, Toshimitsu

    2017-11-01

    We propose and examine a new form of high-density neutral composite of Λ* ≡K- p = (s u bar) ⊗ (uud), which may be called anti-Kaonic Proton Matter (KPM), or simply, Λ*-Matter, where substantial shrinkage of baryonic bound systems originating from the strong attraction of the (K bar N) I = 0 interaction takes place, providing a ground-state neutral baryonic system with a large energy gap. The mass of an ensemble of (K-p)m, where m, the number of the K- p pair, becomes larger than m ≈ 10, is predicted to drop down below that of its corresponding neutron ensemble, (n)m, since the attractive interaction is further increased by the Heitler-London type molecular covalency as well as by chiral symmetry restoration of the QCD vacuum. Since the seed clusters (K- p, K- pp and K-K- pp) are short-lived, the formation of such a stabilized relic ensemble, (K-p)m, may be conceived during the Big-Bang Quark Gluon Plasma (QGP) period in the early universe. At the final stage of baryogenesis a substantial amount of primordial (u bar , d bar)'s are transferred and captured into KPM, where the anti-quarks find places to survive forever. The expected KPM state may be cold, dense and neutral q bar q-hybrid (Quark Gluon Bound (QGB)) states,[ s (u bar ⊗ u) ud ] m, to which the relic of the disappearing anti-quarks plays an essential role as hidden components. KPM may also be produced during the formation and decay of neutron stars in connections with supernova explosions, and other forms may exist as strange quark matter in cosmic dusts.

  14. Principle of minimum distance in space of states as new principle in quantum physics

    International Nuclear Information System (INIS)

    Ion, D. B.; Ion, M. L. D.

    2007-01-01

    ]-quantum states in the pion-nucleon, kaon-nucleon and antikaon-nucleon scatterings can be interpreted as an indirect manifestation the presence of the quarks and gluons as fundamental constituents of the scattering system having the strong-coupling long-range regime required by the Quantum Chromodynamics. (author)