Neutron Star Matter by the Relativistic Mean-Field Model with Renormalized Coupling Constants

A new relativistic mean-field model with the renormalized meson-baryon coupling constants is developed. It is a generalization of the model by Zimanyi-Moszkowski (ZM) based on the constituent quark picture of baryons. Therefore, the renormalizations of the meson-hyperons coupling constants are uniquely determined in contrast to the ZM model and the application of the model to high-density neutron star matter is possible. Our results of the particle composition and the mass-radius relation of neutron stars agree well with those obtained using the phenomenological but realistic effective equation-of-state.