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A NJL-based study of the QCD critical line

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

We employ a 3 flavor NJL model to stress some general remarks about the QCD critical line. The dependence of the critical curve on $μ_q=(μ_u+μ_d)/2$ and $μ_I=(μ_u-μ_d)/2$ is discussed. The quark masses are varied to confirm that, in agreement with universality arguments, the order of transition depends on the number of active flavors $N_f$. The slope of the critical curve vs. chemical potential is studied as a function of $N_f$. We compare our results with those recently obtained in lattice simulations to establish a comparison among different models.

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A. Barducci, R. Casalbuoni, G. Pettini, L. Ravagli. 2005-08-10. A NJL-based study of the QCD critical line. https://doi.org/10.1103/physrevd.72.056002

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