利用相对论平均场理论,考虑了σ*,Ф介子及重子八重态{N,P,A,∑^-,∑0,∑+,Ξ^-,Ξ^0},研究了中子星的性质.发现当考虑了σ*,Ф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poH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.