This chapter covers three rapidly evolving areas of current research in the field of high energy nuclear collisions. Attempts to determine whether novel nuclear states exist, whether nuclei flow like honey, and whether a quark-gluon plasma can be produced. Examines anomalons, hungry quarks, pion condensation, global analysis, nuclear honey, nuclear stopping power and longitudinal growth, and proper energy density achieved. Reviews inconclusive data showing that collective nuclear flow could take place at lower energies. Presents cascade calculations illustrating various flow phenomena. Analyzes the prospects of probing the quark-gluon plasma. Investigates cosmic ray data with events showing charge particle multiplicities up to 1000. Concludes that high enough energy densities can indeed be achieved in nuclear collisions to produce an ideal quark-gluon plasma
Bannik, B.P.; Batusov, Y.A.; Bokova, L.N.; Vokalova, A.; Kuznetsov, O.M.; Lyukov, V.V.; Piskaleva, O.V.; Tolstov, K.D.; Tret' yak, V.I.; Shabratova, G.S.; Andreeva, N.P.; Anzon, Z.V.; Bubnov, V.I.; Gaitinov, A.S.; Eremenko, L.E.; Kalyachkina, G.S.; Kanygina, =.K.; Chasnikov, I.Y.; Gitsok, M.; Marin, A.; Roshu, H.; Haiduk, M.; Hasegan, D.; Bobodzhanov, I.; Leskin, V.A.; Mukhtarov, A.; Shermatov, S.M.; Khoshmukhamedov, R.A.; Dzhuranova, M.S.; Salomov, D.A.; Avetyan, F.A.; Krishchyan, V.M.; Marutyan, N.A.; Matevosyan, K.; Sarkisova, L.G.; Lepekhin, F.G.; Simonov, B.B.; Koraba, J.; Korabovi, M.; Silesh, E.; Wilcincka, B.; Volter, V.; Vosek, B.; Olshecki, A.; Holyncki, R.; Antonchik, V.A.; Bakaev, V.A.; Belousov, A.V.; Bogdanov, S.D.; Ostroumov, V.I.; Bogdanov, V.G.; Plyushchev, V.A.; Solov' eva, Z.I.; Adamovich, M.I.; Larionova, V.G.; Orlova, G.I.; Salmanova, N.A.; Tret' yakova, M.T.; Kharlamov, S.P.; Azimov, S.A.; Abduzhamilov, A.; Abduzhamilov, S.; Gadzhieva, S.; Gulamov, K.G.; Dzhuraev, M.
The mean free path before an inelastic interaction of relativistic fragments of neon-22 nuclei with emulsion nuclei at a momentum of 4.1xA GeV/c is studied as a function of the distance traversed by the fragments. No such dependence is found for fragments with charges from 3 to 9.
Dobrescu, Bogdan A.
Color-singlet gauge bosons with renormalizable couplings to quarks but not to leptons must interact with additional fermions ("anomalons") required to cancel the gauge anomalies. Analyzing the decays of such leptophobic bosons into anomalons, I show that they produce final states involving leptons at the LHC. Resonant production of a flavor-universal leptophobic $Z'$ boson leads to cascade decays via anomalons, whose signatures include a leptonically decaying $Z$, missing energy and several j...
Dobrescu, Bogdan A.
Color-singlet gauge bosons with renormalizable couplings to quarks but not to leptons must interact with additional fermions (''anomalons'') required to cancel the gauge anomalies. Analyzing the decays of such leptophobic bosons into anomalons, I show that they produce final states involving leptons at the LHC. Resonant production of a flavor-universal leptophobic Z' boson leads to cascade decays via anomalons, whose signatures include a leptonically decaying Z, missing energy and several jets. A Z' boson that couples to the right-handed quarks of the first and second generations undergoes cascade decays that violate lepton universality and include signals with two leptons and jets, or with a Higgs boson, a lepton, a W and missing energy.
Session topics were: quarks and nuclear physics; anomalons and anti-protons; the independent particle structure of nuclei; relativistic descriptions of nuclear structure and scattering; nuclear structure at high excitation; advances in nuclear astrophysics; properties of nuclear material; the earliest moments of the universe; and pions and spin excitations in nuclei
These proceedings contain the articles presented at the named conference. They deal with relativistic heavy ion reactions, the expansion and freeze-out of nuclear matter, anomalon experiments, and multifragmentation and particle correlations in heavy ion reactions. See hints under the relevant topics. (HSI)
Topics include a study of the cascade depletion effect in nuclear reaction calculations, spallation of medium mass targets (scandium, bromine and gallium production), the eigenvector decomposition algorithm for parametrizing spallation charge distribution data, and interaction mean free paths for projectile fragments from relativistic heavy ion reactions in emulsions (anomalons). Publications are listed. 35 references
Bromley, D.A. (Yale Univ., New Haven, CT (USA). Wright Nuclear Structure Lab.)
The author reviews the development of nuclear physics with heavy ions. In this connection he considers elastic scattering and the structure of nuclear molecules, dynamic symmetries in nuclear structure and nuclear reactions, supersymmetry in nuclei, the study of high spin states by heavy ion reactions, deep inelastic heavy ion reactions, the positron production in the Coulomb field of a superheavy nuclear molecule, the study of hydrodynamic and thermodynamic properties of nuclear matter, anomalons, as well as applications to geophysics and technology.
ZHANG DONG-HA1; SUN HAN-CHENG; G.GHARIBI
The interaction mean free path of He projectile fragments, produced by the collisions of 16O at 60 A GeV in a nuclear emulsion, has been investigated. In the present analysis, 1555 He projectile fragments, giving rise to 320 secondary interactions, have been used. At a level of 3% a very weak signal of anomalons is observed, which comes mainly from the 3×He channel.
The question Are Anomalons Multiquark Exotics is discussed. It is concluded that so far there is no convincing experimental evidence for any multiquark exotic bound state nor for any exotic resonance. Except for the delta and S* there are no candidates for bound states and no firm theoretical predictions waiting to be tested. Exotic resonances may exist in the 1.5 to 2.0 GeV region and in the charmed sector, e.g., the charmed-strange exotics. The experimental search for multiquark resonances is still open and active
Research at the Two Armed Spectrometer System and the Heavy Ion Spectrometer System at the Bevalac by the Louisiana State University group is briefly described. Topics include forward-backward correlation measurements in proton-carbon collisions at 2.1 GeV, search for anomalons, subthreshold negative pions and energetic protons produced at wide angles in 246 MeV per nucleon 139La + 139La collisions, rapidity distributions of pions produced in Ca + Ca interactions at 1.05 GeV per nucleon, and the ratio of leptons to pions produced in the interactions between protons and Be. Radiation detector development is discussed. Two attached papers include the multinomial distribution and the calculation of particle multiplicities in segmented detectors and blackbody radiation from thermal fireballs
The present collection of rapid communications from JINR, Dubna, contains nine separate reports on effects arising from charged particles overcoming of the light velocity barrier, deformable templates for circle recognition, scintillation detectors for precise time measurements, atomic form factors and incoherent scattering functions of atoms and ions with the number of electrons N ≤ 10, experimental set-up ANOMALON for measurement of relativistic nuclear fragmentation cross sections, superconducting dipole magnet for ALICE dimuon arm spectrometer, analysis of transverse mass dependence of Bose-Einstein correlation radii using the DELPHI data, low-energy theorem in softly broken supersymmetry and study of the characteristics of particles in reactions π-, p, d, He, C + C with the total disintegration on carbon nucleus
Electric resistivity measurements in function of the temperature (1,5 2 psendo-binary intermetallic compound series in the (x < = 0,20) iron concentrated region. The curves obtained show an anomalons behaviour with evidences of the existence of several magnetic types along the series and also in function of the temperature. Some results are interpreted based on magnetization measurements in some concentrations, which show a characteristic behaviour of spin glass or mictomagnetism at low temperature and evidence of magnetic disordering lowering the temperature from ambient T. The residual, magnetic and phonon resistivity, critical temperature and other data are obtained. It is estimated the contributions due the spin glass clusters and/or mictomagnetism to the residual resistivity and how these contributions affect other quantities. (L.C.)
Four current puzzles and several future experimental possibilities in high-energy nuclear collision research are discussed. These puzzles are (1) entropy, (2) hydrodynamic flow, (3) anomalon, and (4) particle emission at backward angles in proton-nucleus collisions. The last one seems not to be directly related to the subject of the present school. But it is, because particle emission into the region far beyond the nucleon-nucleon kinematical limit is an interesting subject common for both proton-nucleus and nucleus-nucleus collisions, and the basic mechanism involved is strongly related in these two cases. Future experimental possibilities are described which include: (1) possibilities of studying multibaryonic excited states, (2) applications of neutron-rich isotopes, and (3) other needed experimental tasks. 72 references
This report is a review of the activities of the period from August 1, 1981 through August 31, 1982. The final analysis of pi-zero production in heavy ion collisions representing experiments at the Bevalac with a system previously described is completed. The main results involve cross sections for central collisions resulting in the production of pi-zeros, charged pions, and proton multiplicities, and some results of correlations and low energy gamma radiation. Results from the alpha-alpha experiment at the CERN ISR are included in the form of a published paper and an outline of papers that are in press. A short report of a collision effect in an anomalon experiment is included as well. The energetic particle spectra from μ--capture in medium heavy nuclei were studied at TRIUMF, using the large scintillation counters for neutron and proton detection and multiple Ge(Li) and NaI(Tl) counters. The preliminary analysis indicates the presence of such an unusual energetic component. The measurement of the particle and γ-ray correlation in π--capture in 165Ho was completed during this year, and the data analysis is continuing in order to elucidate the discrete spectral features, high spin generation and other correlations. A measurement was finished in our search for a new type of strong perturbation of pionic x-ray by the use of coincidences between pionic x-rays and γ-rays from a deformed nuclei