奇异强子物质的有效模型描述

原子核物理评论 , 2001, 18(1): 9-15. doi: 10.3969/j.issn.1007-4627.2001.01.002

奇异强子物质的有效模型描述

宋宏秋 ^1, , 章利良 ^2, , 苏汝铿 ^3, , 王平 ^4,

1.兰州重离子加速器国家实验室原子核理论中心，甘肃兰州 730000;中国科学院上海原子核研究所，上海 201800

2.中国科学院上海原子核研究所，上海 201800

3.复旦大学, 上海 200433

4.复旦大学, 上海 200433

基金项目: 国家自然科学基金(19975010,10075071) 教育部科学技术研究项目中国科学院基础研究重大科研项目(KJ951-A1-410)

关键词：奇异强子物质 , 稳定性 , FST模型

Strange Hadronic Matter in an Effective Model

把FST模型推广到包含奇异性的情形，并在平均场近似下用它来研究含有核子、Λ超子和Ξ超子的奇异强子物质的性质．讨论了有效重子质量对介质密度和奇异数含量的依赖性以及奇异强子物质的饱和性和稳定性.

The strange hadronic matter with nucleon,Λ-hyperon andΞ-hyperonis was studied by using an effective model in a mean-field approximation.The density dependence of the effective baryon masses as well as the saturation properties and stabilities of the strange hadronic matter were discussed.The result indicates a quite large strangeness fraction range where the multi-hyperon nuclear matter is stable against particle emission.In the large strangeness fraction region the Ξ component dominates,resulting in a deeply bound state.The strange mesons play an important role in mediating the strong interaction between the hyperons.

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