Relativistic mean-field approach to infinite nuclear matter and neutron star

The properties of infinite nuclear matter and neutron star are studied theo retically in relativistic mean-field (RMF) approach with three typical para meter sets NI,I, NL-SH and TMI. It is found that all these new RMF paramete r sets can very satisfactorily reproduce the properties of high, density ma tter. Among these parameter sets, TMI, with a nonlinear omega term, reprodu ces a slightly smaller energy, pressure and neutron star mass than NL-SH an d NL1. The rho meson field has a large influence on the properties of neutr on star and infinite nuclear matter. A detailed discussion for the signific ance of numerical results is also given.