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题名: In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
作者: Feng, ZQ;  Xie, WJ;  Chen, PH;  Chen, J;  Jin, GM
刊名: PHYSICAL REVIEW C
出版日期: 2015
卷号: 92, 期号:4, 页码:44604
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevC.92.044604
通讯作者: Feng, ZQ (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
文章类型: Article
英文摘要: Dynamics of pseudoscalar mesons (pi, eta, K, and (K) over bar) and hyperons (Lambda and Sigma) produced in heavy-ion collisions near threshold energies has been investigated within the Lanzhou quantum molecular dynamics transport model. The in-medium modifications on particle production in dense nuclear matter are implemented in the model through corrections on the elementary cross sections and by inclusion of the meson-nucleon (or hyperonnucleon) potentials, in which the isospin effects are considered. It is found that the transportation of particles are influenced with the in-medium corrections. The total number of pions is reduced with an isospin-, density-, and momentum-dependent pion-nucleon potential. However, the ratios of charged pions is enhanced with inclusion of the potential. The production of eta in the domain of midrapidities and high momenta is sensitive to the n-nucleon potential but weakly depends on symmetry energy. The attractive antikaon-nucleon potential enhances the subthreshold (K) over bar production and also influences the structure of phase-space distributions. The dynamics of etas, kaons, antikaons, and hyperons is also influenced by the pion potential because of collisions between pions and nucleons (resonances). The impacts of mean-field potentials on particle dynamics are investigated, such as the phase-space distributions from rapidity and transverse momentum spectra, inclusive invariant spectra, collective flows, etc.
类目[WOS]: Physics, Nuclear
关键词[WOS]: SUBTHRESHOLD KAON PRODUCTION ;  NUCLEAR-MATTER ;  ANTIKAON PRODUCTION ;  SYMMETRY ENERGY ;  RESONANCE MODEL ;  PION-PRODUCTION ;  K+ PRODUCTION ;  ETA-MESONS ;  EQUATION ;  STATE
收录类别: SCI
项目资助者: Major State Basic Research Development Program in China [2014CB845405, 2015CB856903] ;  National Natural Science Foundation of China [11175218, U1332207] ;  Youth Innovation Promotion Association of Chinese Academy of Sciences ;  Yuncheng University [YQ2014014]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20829
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Feng, ZQ,Xie, WJ,Chen, PH,et al. In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions[J]. PHYSICAL REVIEW C,2015,92(4):44604.
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