Neutral quark matter in a Nambu-Jona Lasinio model with vector interaction

Abstract

We investigate the three flavor Nambu-Jona Lasinio model of neutral quark matter at zero temperature and finite density, keeping 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 NJL, VENJL in the following). 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.

19 pages, Revtex4. Enlarged discussion of the new kaon excitation at large $mu$, revised Introduction, some reference added. Version to appear on Phys. Rev. D

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• Hadronic and hybrid stars subject to density dependent magnetic fields
• Quark magnetar in three-flavor Nambu--Jona-Lasinio model with vector interaction and magnetized gluon potential
• QCD phase diagram at finite baryon and isospin chemical potentials in Polyakov loop extended quark meson model with vector interaction
• Repulsive Vector Interaction in Three Flavor Magnetized Quark and Stellar Matter
• Finite-size effects on the hadron-quark phase transition in neutron stars
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• Crystalline chiral condensates as a component of compact stars
• Gluon effects on the equation of state of color superconducting strange stars
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• SU(2) low energy quark effective couplings in weak external magnetic field
• Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line