DECONFINEMENT TRANSITION IN PROTONEUTRON STARS

In this paper we study the transition from hadron matter to quark matter in the presence of a gas of trapped electron neutrinos assuming color and flavor conservation during the transition. For the hadronic phase we use a parametrization of a nonlinear Walecka model which includes the whole baryon octet. For the quark matter phase we use MIT model including color superconductivity. Deconfinement is considered to be a first-order phase transition that conserves color and flavor. Our results show that neutrino trapping increases the deconfinement density but color superconductivity decreases it. As a consequence, the transition density in the protoneutron star phase is determined by a competition between between temperature, neutrino trapping and quark pairing.