Abstract
We investigate the three flavor Nambu--Jona-Lasinio model of neutral quark matter at zero temperature and finite density, taking into account the scalar, the pseudoscalar, and the Kobayashi-Maskawa-'t Hooft interactions as well as the repulsive vector plus axial-vector interaction terms (vector extended Nambu---Jona-Lasinio). We focus on the effect of the vector interaction on the chiral restoration at finite density in neutral matter. We also study the evolution of the charged pseudoscalar meson energies as a function of the quark chemical potential.
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