The effect of isoscalar-isovector coupling in infinite nuclear matter

Abstract

Working on the framework of Relativistic Mean Field theory, we exposed the effect of nonlinear isoscalarisovector coupling on G2 parameter set on the density dependence of nuclear symmetry energy in infinite nuclear matter. The observables like symmetric energy and few related coefficients are studied systematically. We presented the results of stiff symmetry energy at sub-saturation densities and a soft variation at normal densities. Correlation between the symmetric energy and the isoscalar-isovector coupling parameter fully demonstrated for wide range of density. The work further extended to the octet system and showed the effect of coupling over the equation of state.

The Influence of the Enhanced Vector Meson Sector on the Properties of the Matter of Neutron Stars

“…The standard version of the introduction of the meson field is of a minimal type without any nonlinearities. This case has been further enlarged by the nonlinear mixed isoscalar-isovector couplings, which modify the density dependence of the mean field and the symmetry energy [31] – [33] . The analysis of the nonlinear models should include results obtained for the relativistic FSUGold parametrisation [34] .…”