Study of Beta Equilibrated 2+1 Flavor Quark Matter in PNJL Model

TL;DR

This paper investigates the phase diagram of 2+1 flavor quark matter in beta equilibrium using the PNJL model, highlighting differences from the NJL model in thermodynamic properties relevant to astrophysics and heavy ion collisions.

Contribution

It provides the first detailed comparison of thermodynamic observables between the PNJL and NJL models for 2+1 flavor quark matter in beta equilibrium.

Findings

Differences in speed of sound, specific heat, and densities between models.

Insights into superdense matter relevant for heavy ion collisions and stellar cores.

Abstract

We report a first case study of the phase diagram of 2+1 flavor strongly interacting matter in $\beta-$equilibrium, using the Polyakov$-$Nambu$-$Jona-Lasinio model. Physical characteristics of relevant thermodynamic observables have been discussed. A comparative analysis with the corresponding observables in the Nambu-Jona-Lasinio model is presented. We find distinct differences between the models in terms of a number of thermodynamic quantities like the speed of sound, specific heat, various number densities as well as entropy. The present study is expected to give us a better insight into the role that the superdense matter created in heavy ion collision experiments play in our understanding of the properties of matter inside the core of supermassive stars in the Universe.