Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-01-04
Acta Phys.Polon.Supp.3:735-740,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 pages, 3 figures, poster presented at XXVI Max Born Symposium, 'Three Days of Strong Interaction', Wroclaw (Poland), 9-11 Ju
Scientific paper
We have studied the phenomenology of pion condensation in 2-flavor neutral quark matter at finite density with Nambu--Jona-Lasinio (NJL) model of QCD. We have discussed the role of the bare quark mass $m$ and the electric chemical potential $\mu_{e}$ in controlling the condensation. The central result of this work is that the onset for $\pi$-condensed phase occurs when $|\mu_{e}|$ reaches the value of the in-medium pion mass $M_{\pi}$ provided the transition is of the second order, even for a composite pion system in the medium. Finally, we have shown that the condensation is extremely fragile with respect to the explicit chiral symmetry breaking via a finite current quark mass.
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