Diquark condensation effects on hot quark star configurations

The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation. We investigate the effects of a variation of the formfactors of the interaction on the phase diagram of quark matter under the condition of βequilibrium and charge neutrality. Special emphasis is on the occurrence of a diquark condensate which signals a phase transition to color superconductivity and its effects on the equation of state. We calculate the quark star configurations by solving the TolmanOppenheimerVolkoff equations and obtain for the transition from a hot, normal quark matter core of a protoneutron star to a cool diquark condensed one a release of binding energy of the order of ∆Mc2 ∼ 1053 erg. We discuss the claim that this energy could serve as an engine for explosive phenomena. PACS number(s): 04.40.Dg, 12.38.Mh, 26.50.+x, 97.60.Bw