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strangeness production in pA and AA collisions at 158 A GeV

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Science China Mathematics 2000年第6期43卷 623-628页

作者：王晓荣萨本豪周代翠刘涵蔡勖 Institute of Particle Physics Hua-Zhong Normal University Wuhan 430079 China China Institute of Atomic Energy Beijing 102413 China CCAST (World Lab.) Beijing 100080 China Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China PPE Division CERN Geneva 23 CH-1211 Switzerland

LUCIAE, a hadronic and string cascade model and its corresponding event generator are used to analyse strangeness production singly and multiply in p-Pb and Pb-Pb collisions at 158 A GeV. Spectra of multiplicity and transverse mass for single $(\Lambda ,\overline \Lambda )$ and multiple $(\Xi ^ - ,\overline {\Xi ^ - } ,\Omega ^ - ,\overline {\Omega ^ - } )$ strangeness are given. In LUCIAE model it suggests a physical mechanism, i.e. the dependence of the strange quark suppression factor on incident energy, projectile mass and centrality of colliding system might result in increase of yield of strange particles with increasing the above three parameters. Calculations from the model reconstruct well the WA97 experimental data: increase of yield of strange particles with increasing centrality and increase of strangeness enhancement with increasing number of strange quarks, in relativistic nucleus-nucleus collisions.

关键词： relativistic heavy-ion collision strangeness production LUCIAE model.

strangeness to increase the density of finite nuclear systems in constraining the high-density nuclear equation of state

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Nuclear Science and Techniques 2017年第12期28卷 244-247页

作者： Wei-Zhou Jiang Rong-Yong Yang Si-Na Wei Department of Physics Southeast UniversityNanjing 211189China

As the high-density nuclear equation of state(EOS) is not very well constrained, we suggest that the structural properties from the finite systems can be used to extract a more accurate constraint. By including the strangeness degrees of freedom, the hyperon or anti-kaon, the finite systems can then have a rather high-density core which is relevant to the nuclear EOS at high densities directly. It is found that the density dependence of the symmetry energy is sensitive to the properties of multi-K hypernuclei, while the high-density EOS of symmetric matter correlates sensitively to the properties of kaonic nuclei.

关键词： Nuclear equation of state Relativistic meanfield theory strangeness

STRANGE ANTIBARYON PRODUCTION DATA AND REDUCTION OF strangeness SUPPRESSION IN SULPHUR-NUCLEUS COLLISIONS AT 200A GeV

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青岛大学学报(自然科学版) 1997年第2期 43-43页

作者：萨本豪泰安中国科学院高能物理所中国原子能科学研究院

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关键词：北京 strangeness SUPPRESSION PRODUCTION DATA OF COLLISIONS SULPHUR-NUCLEUS AND ANTIBARYON

1-4 strangeness Production in Antiproton Induced Nuclear Reactions.

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IMP & HIRFL Annual Report 2014年第1期 7-8页

作者： Feng Zhaoqing 不详

More localized energy deposition is able to be produced in antiproton-nucleus collisions in comparison withheavy-ion collisions due to annihilation reactions. Searching for the cold quark-gluon plasma (QGP) with antiprotonbeamshas been considered as a hot topic both in experiments and in theretical calculations over the past severaldecades. strangeness production and hypernucleus formation in antiproton-induced nuclear reactions are importancein exploring the hyperon (antihyperon)-nucleon (HN) potential and the antinucleon-nucleon interaction, whichhave been hot topics in the forthcoming experiments at PANDA in Germany.

关键词： strangeness Production Antiproton

Reaction dynamics for photoproductions of baryon resonances

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Chinese Physics C 2009年第12期33卷 1167-1174页

作者： A. Hosaka T. Hyodo D. Jido H.-Ch. Kim H. Nagahiro S.I. Nam M. Oka S. Ozaki Rresearch Center for Nuclear Physics Osaka University Ibaraki 567-0047 Japan Department of Physics Tokyo Institute of Technology Meguro 152-8551 Japan Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan Department of Physics Inha University Incheon 402-751 Republic of Korea Department of Physics Nara Women's University Nara 630-8506 Japan Department of Physics Chung-Yuan Christian University Chung-Li 32023 China

The study of exotic structure of hadrons is fully achieved when reaction dynamics of the associated hadron productions is well understood. We employ as the standard mechanism the effective Lagrangian method and investigate several physical observables within the framework. The parameters are constrained by microscopic description of hadrons. We discuss photoproductions of kaon associated with the ground state A（1116） and its resonances A（1405） and A（1520）. In the former example we emphasize the meson cloud effect which significantly renormalizes the phenomenological parameters, while in the latter we discuss the features of the standard method. Finally we discuss briefly the N（1535） for the study of chiral symmetry of baryons. production of ηπ associated with the nucleon resonance

关键词： photoproduction strangeness baryon resonances

Nuclear dynamics and particle production near threshold energies in heavy-ion collisions

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Nuclear Science and Techniques 2018年第3期29卷 107-137页

作者： Zhao-Qing Feng Institute of Modern Physics Chinese Academy of Sciences

Recent progress of the quantum molecular dynamics model for describing the dynamics of heavy-ion collisions is viewed, in particular the nuclear fragmentation, isospin physics, particle production and in-medium effect, hadron-induced nuclear reactions, hypernucleus, *** neck fragmentation in Fermi-energy heavy-ion collisions is investigated for extracting the symmetry energy at subsaturation densities. The isospin effects, in-medium properties, and the behavior of high-density symmetry energy in medium-and high-energy heavy-ion collisions are thoroughly discussed. The hypernuclide dynamics formed in heavy-ion collisions and in hadron-induced reactions is analyzed and addressed in the future experiments at the high-intensity heavy-ion accelerator facility(HIAF).

关键词： LQMD transport model Heavy-ion reactions Hadron-induced nuclear reactions Symmetry energy strangeness production

Five-quark components in N*(1535)

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Chinese Physics C 2009年第12期33卷 1393-1396页

作者：安春生 Institute of High Energy Physics CAS P.O.Box 918 Graduate University Chinese Academy of Sciences

Here we employ the extended chiral constituent quark model to investigate the five-quark components in the N＊（1535） resonance. The axial charge of N＊（1535） and the electromagnetic transition γ＊N → N＊（1535... 详细信息

关键词： N* (1535) five-quark components strangeness

Development of Polarized HD Target for Future LEPS Experiments at SPring-8

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原子核物理评论 2009年第S1期26卷 79-82页

作者： H.Kohri M.Fujiwara K.Fukuda T.Kunimatsu C.Morisaki T.Ohta K.S.Ueda M.Uraki M.Utsuro M.Yosoi Research Center for Nuclear Physics(RCNP) Osaka University College of Medical Technology Kyoto University

We are carrying out hadron photoproduction experiments by using polarized photon beams at SPring-8 in Japan. In 2005,we started developing a polarized HD target for future experiments using both the polarized photon beams and the polarized target. The polarized HD target is an idealistic target for experiments observing reactions with small cross sections because the HD does not include heavy nuclei which produce many background events. The measurement of double polarization asymmetries is expected to give much important information to investigate the nucleon hidden structure,hadron photoproduction dynamics,and exotic hadron property. We report on the present status of the development of the polarized HD target at RCNP.

关键词： strangeness photon target

The Origin of the Color Charge into Quarks

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Journal of High Energy Physics, Gravitation and Cosmology 2019年第1期5卷 1-34页

作者： Giovanni Guido Department of Physics and Mathematics High Scholl “C. Cavalleri” Parabiago Milano Italy

Showing the origin of the mass in an additional coupling between field quantum oscillators, we formulate a hypothesis of a geometrical structure of the oscillators of “fields-particles”. In this way, we define the possible structure of quarks and hadrons (as the proton). This hypothesis is reasonable if one admits field oscillators composed by sub-oscillators at semi-quantum (IQuO) and in which a degree of internal freedom is definable. Using the IQuO model, we find the origin of the sign of electric charge in to particles and, in quarks, the isospin, the strangeness and colour charge. Finally, we formulate the structure of the gluons and the variation modality of the colour charge in quarks.

关键词： Massive Coupling “Aureus” Ratio Geometrical Structure IQuO Semi-Quantum Sub-Oscillator Entangled Quantum Vacuum Electric Charge Isospin strangeness Color Gluon