Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-05-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 1 table, 1 figure. To appear in Proceedings for "Compact stars in the QCD phase diagram II (CSQCD II), May 20-24, 200
Scientific paper
The combined effect of the repulsive vector interaction and the positive electric chemical potential on the chiral phase transition is investigated by considering neutral color superconductivity. Under the charge-neutrality constraint, the chiral condensate, diquark condensate and quark number densities are obtained in two-plus-one-flavor Nambu-Jona-Lasinio model with the so called Kobayashi-Maskawa-'t Hooft term. We demonstrate that multiple chiral critical-point structures always exist in the Nambu-Jona-Lasinio model within the self-consistent mean-field approximation, and that the number of chiral critical points can vary from zero to four, which is dependent on the magnitudes of vector interaction and the diquark coupling.
Kunihiro Teiji
Zhang Zhao
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