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Sigma(-)/Sigma(+) ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities
Li, Q; Li, Z; Zhao, E; Gupta, RK; Li, Q , Univ Frankfurt, FIAS, Max Von Laue Str 1, D-60438 Frankfurt, Germany.
2005
发表期刊PHYSICAL REVIEW C
ISSN0556-2813
卷号71期号:5页码:-
摘要Based on the UrQMD (ultrarelativistic quantum molecular dynamics) model, we have investigated the influence of the symmetry potential on the negatively and positively charged pi and Sigma hyperon production ratios in heavy ion collisions at the SIS (SchwerIonen Synchrotron) energies. We find that, in addition to pi(-)/pi(+) ratio, the Sigma(-)/Sigma(+) ratio can be taken as a sensitive probe for investigating the density dependence of the symmetry potential of nuclear matter at high densities (1-4 times normal baryon density). This sensitivity of the symmetry potential to both the pi(-)/pi(+) and Sigma(-)/Sigma(+) ratios is found to depend strongly on the incident beam energy. Furthermore, the Sigma(-)/Sigma(+) ratio is shown to carry the information about the isospin-dependent part of the Sigma hyperon single-particle potential.
部门归属Univ Frankfurt, FIAS, D-60438 Frankfurt, Germany; China Inst Atom Energy, Beijing 102413, Peoples R China; Ctr Theoret Nucl Phys, Natl Lab Lanzhou Heavy Ion Accelerator, Lanzhou 730000, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Punjabi Univ, Dept Phys, Chandigarh 160014, India
关键词Heavy-ion Collisions Neutron-stars Matter Hypernuclei Energies Isospin State
学科领域Physics
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收录类别SCI
WOS记录号WOS:000229440200056
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被引频次:47[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13831
专题理论物理所1978-2010年知识产出
通讯作者Li, Q , Univ Frankfurt, FIAS, Max Von Laue Str 1, D-60438 Frankfurt, Germany.
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Li, Q,Li, Z,Zhao, E,et al. Sigma(-)/Sigma(+) ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities[J]. PHYSICAL REVIEW C,2005,71(5):-.
APA Li, Q,Li, Z,Zhao, E,Gupta, RK,&Li, Q , Univ Frankfurt, FIAS, Max Von Laue Str 1, D-60438 Frankfurt, Germany..(2005).Sigma(-)/Sigma(+) ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities.PHYSICAL REVIEW C,71(5),-.
MLA Li, Q,et al."Sigma(-)/Sigma(+) ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities".PHYSICAL REVIEW C 71.5(2005):-.
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