SU(2) Chiral Sigma Model Study of Phase Transition in Hybrid Stars

Abstract

We use a modified SU(2) chiral sigma model to study nuclear matter component and simple bag model for quark matter constituting a neutron star. We also study the phase transition of nuclear matter to quark matter with the mixed phase characterized by two conserved charges in the interior of highly dense neutron stars. Stable solutions of Tolman-Oppenheimer-Volkoff equations representing hybrid stars are obtained with a maximum mass of 1.67$M_{\odot }$ and radius around 8.9 km.

Comments: 14 pages, 5 figures