奇异强子物质的有效模型描述  

Strange Hadronic Matter in an Effective Model

作　　者：宋宏秋[1] 章利良[2] 苏汝铿[3] 王平[3] 

机构地区：[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 [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

出　　处：《原子核物理评论》2001年第1期9-14,共6页Nuclear Physics Review

基　　金：国家自然科学基金!资助项目 (19975 0 10 ;10 0 75 0 71) ;中国科学院基础研究"九五"重大项目! (KJ95 1-A1-4 10 ) ;国家教委资助

摘　　要：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 and Ξ 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.

关 键 词：奇异强子物质 稳定性 FST模型 有效重子质量 介质密度 奇异数含量 饱和性 平均场 原子核结构 

分 类 号：O571.2[理学—粒子物理与原子核物理] O572.34[理学—物理]