Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-04-02
Phys.Lett. B564 (2003) 217-224
Physics
High Energy Physics
High Energy Physics - Phenomenology
Typed in RevTex4, pages 12, figures 2. Two references added
Scientific paper
10.1016/S0370-2693(03)00705-6
We use an effective QCD model (ladder-QCD) to explore the phase diagram for chiral symmetry breaking and restoration at finite temperature with different $u,d$ quark chemical potentials. In agreement with a recent investigation based on the Nambu-Jona-Lasinio model, we find that a finite pion condensate shows up for high enough isospin chemical potential $\mu_{I}=(\mu_{u}-\mu_{d})/2$. For small $\mu_{I}$ the phase diagram in the $(\mu_B,T)$ plane shows two first order transition lines and two critical ending points.
Barducci Alessandro
Casalbuoni Roberto
Pettini Giulio
Ravagli Lorenzo
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