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The phase diagram and bulk thermodynamical quantities in the NJL model at finite temperature and density

Thomas M. Schwarz·Sandra P. Klevansky·Gabor Papp
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Abstract

We reexamine the recent instanton motivated studies of Alford, Rajagopal and Wilczek, and Berges and Rajagopal in the framework of the standard SU(2) Nambu-Jona-Lasinio model. The chiral phase diagram is calculated in the temperature--density plane, and the pressure is evaluated as the function of the density. Obtaining simple approximate relations describing the $T$-$μ$ and $T$-$p_F$ phase transition lines we find that the results of the instanton based model and that of the NJL model are identical. The diquark transition line is also given.

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Thomas M. Schwarz, Sandra P. Klevansky, Gabor Papp. 1999-09-08. The phase diagram and bulk thermodynamical quantities in the NJL model at finite temperature and density. https://doi.org/10.1103/physrevc.60.055205

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