Thermodynamical properties of relativistic nuclear matter with derivative scalar coupling

Abstract

The relativistic nuclear mean-field model with derivative scalar coupling suggested by Zimanyi and Moszkowski is extended to finite temperature by means of the real-time Green's function method with a pair cutoff approximation. The temperature and density dependences of the nucleon masses are given. The obtained equation of state is used to discuss the liquid-gas phase transition of nuclear matter. The critical temperature and density given by this model are ${\mathit{kT}}_{\mathit{C}}$=16.51 MeV and ${\mathrm{\ensuremath{\rho}}}_{\mathit{C}}$=0.0675 ${\mathrm{fm}}^{\mathrm{\ensuremath{-}}3}$, respectively.