Effect of neutrino trapping on the three flavor FFLO phase of QCD

Abstract

We compute the effect of a non-zero lepton chemical potential on the structure of the three flavor Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase of QCD at finite temperature. We show that, as in the BCS case, the lepton chemical potential favors two-species color superconductivity and disfavors the three species pairing. We stress that this study could be relevant for the cooling of a proto-neutron star with a FFLO core, if the temperatures are higher than the un-trapping temperature.

Comments: 12 pages, 2 figures, RevTeX4 class. Changed Fig. 2 (see text) and some reference added