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arXiv · hep-ph/0304019

Ladder-QCD at finite isospin chemical potential

A. Barducci·R. Casalbuoni·G. Pettini·L. Ravagli
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Abstract

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 $μ_{I}=(μ_{u}-μ_{d})/2$. For small $μ_{I}$ the phase diagram in the $(μ_B,T)$ plane shows two first order transition lines and two critical ending points.

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A. Barducci, R. Casalbuoni, G. Pettini, L. Ravagli. 2003-04-03. Ladder-QCD at finite isospin chemical potential. https://doi.org/10.1016/s0370-2693(03)00705-6

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