Sigma(-)/Sigma(+) ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities
文献类型：期刊论文
| 作者 | Li, Q; Li, Z; Zhao, E; Gupta, RK |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2005-05 |
| 卷号 | 71 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/PhysRevC.71.054907 |
| 英文摘要 | 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. |
| WOS关键词 | HEAVY-ION COLLISIONS ; NEUTRON-STARS ; MATTER ; HYPERNUCLEI ; ENERGIES ; ISOSPIN ; STATE |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000229440200056 |
| 源URL | [http://119.78.100.186/handle/113462/56918]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Li, Q |
| 作者单位 | 1.Goethe Univ Frankfurt, FIAS, D-60438 Frankfurt, Germany 2.China Inst Atom Energy, Beijing 102413, Peoples R China 3.Ctr Theoret Nucl Phys, Natl Lab Lanzhou Heavy Ion Accelerator, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China 5.Punjabi Univ, Dept Phys, Chandigarh 160014, India |
| 推荐引用方式 GB/T 7714 | 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. |
| APA | Li, Q,Li, Z,Zhao, E,&Gupta, RK.(2005).Sigma(-)/Sigma(+) ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities.PHYSICAL REVIEW C,71. |
| 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(2005). |
入库方式： OAI收割
来源：近代物理研究所
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