Effect of Λv coupling on liquid gas phase transition in warm asymmetric nuclear matter

Abstract

We present a comprehensive analysis on several features of liquid gas (LG) phase transition in warm asymmetric nuclear matter using relativistic mean field model with isoscalar-isovector Λv coupling. At subsaturation as well as supranormal densities, the Λv coupling systematically controls the density dependence of nuclear symmetry energy in the relativistic mean field model. We found that the boundary of LG phase-coexistence region increases with the higher values of Λv coupling. Similarly the maximal isospin asymmetry, critical pressure and critical temperature increases with the increasing values of Λv, which shows that the liquid gas phase transition is quite sensitive to the density dependence of symmetry energy in hot asymmetric nuclear matter.