Pion condensation in electrically neutral cold matter with finite baryon density

Details Pion condensation in electrically neutral cold matter with finite baryon density Pion condensation in electrically neutral cold matter with finite baryon density

2005-10-17

arxiv.org/abs/hep-ph/0510222v2

Eur.Phys.J.C46:771-776,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages; 3 figures; one reference added; to be published in Eur.Phys.J.C

Scientific paper

10.1140/epjc/s2006-02527-5

The possibility of the pion condensation phenomenon in cold and electrically neutral dense baryonic matter is investigated in $\beta$-equilibrium. For simplicity, the consideration is performed in the framework of a NJL model with two quark flavors at zero current quark mass and for rather small values of the baryon chemical potential, where the diquark condensation might be ignored. Two sets of model parameters are used. For the first one, the pion condensed phase with finite baryon density is realized. In this phase both electrons and the pion condensate take part in the neutralization of the quark electric charge. For the second set of model parameters, the pion condensation is impossible if the neutrality condition is imposed. The behaviour of meson masses vs quark chemical potential has been studied in electrically neutral matter.

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