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 densit...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.展开更多
Many theoretical methods have predicted that the low density nuclear matter can encounter chemical instability. However, for high density nuclear matter, very little knowledge is known to people. In this work, the che...Many theoretical methods have predicted that the low density nuclear matter can encounter chemical instability. However, for high density nuclear matter, very little knowledge is known to people. In this work, the chemical instability at high density nuclear matter and its dependence on the symmetry potential are investigated.Fig.l(a) and (b) show (μn/δ)|p versus density p at zero temperature and relative neutron excesses展开更多
基金The project supported in part by the Key Research Plan of Theoretical Physics and Cross Science under Grant No.90103018
National Natural Science Foundation of China under Grant No.19975062
文摘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.
文摘Many theoretical methods have predicted that the low density nuclear matter can encounter chemical instability. However, for high density nuclear matter, very little knowledge is known to people. In this work, the chemical instability at high density nuclear matter and its dependence on the symmetry potential are investigated.Fig.l(a) and (b) show (μn/δ)|p versus density p at zero temperature and relative neutron excesses
