摘要
利用相对论平均场理论,考虑了σ*,φ介子及重子八重态{N,P,Λ,∑-,∑0,∑+,Ξ-,Ξ0},研究了中子星的性质．发现当考虑了σ*,φ介子的贡献时,超子出现的临界重子数密度降低了,超子数目增加了．超子星的转变密度ρ0H降低了,物态方程变软,最大质量变小而相应的中子星半径增大,中子星的中心重子数密度、中心能量密度和中心压强均降低．
In the RMF approach, considering the contributions of the σ＊, and Ф mesons and the hyperons in the baryon octet {N,P,A,∑^-,∑0,∑＋,Ξ^-,Ξ^0}, the properties of neutron star matter have been investigated. It is found that with the contributions of the a＊ and dp mesons, the critical baryon density of hyperon appearance decreases, the number of hyperons increases, the transition density ροН of hyperon stars decreases, the equation of state turns soft, the maximum mass of neutron star decreases and the corresponding radius increases, the central density, the central energy density and the central pressure are all reduced.
出处
《高能物理与核物理》
SCIE
CAS
CSCD
北大核心
2007年第4期345-349,共5页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金(10375039
90503008)
教育部博士点基金
兰州重离子加速器国家实验室核理论中心基金资助~~
关键词
超子
中子星
物态方程
物质
hyperons, neutron star, equation of state
