Neutron Star Structure in a Nonlinear Realization of Chiral SU（3）.Spontaneous Breaking Model

摘要

We investigate neutron star properties by constructing a chiral SU(3) spontaneous breaking Lagrangian and using relativistic mean-field approximation. The results show that π- condensate appears at some baryon densities,and hyperons ∑- and A exist in neutron star matter at high density. In this model, neutron star's maximum mass is 1.12Ma with corresponding radius about 8 km.