Finite temperature properties of a modified Polyakov$-$Nambu$-$Jona-Lasinio model

TL;DR

This paper investigates the thermodynamic properties of strongly interacting matter using a modified Polyakov-Nambu-Jona-Lasinio model, achieving close agreement with lattice QCD data without extra parameters, and enabling extension to finite chemical potentials.

Contribution

The study introduces a modified PNJL model that includes hadrons without additional parameters, improving the modeling of thermodynamics and extending applicability to finite chemical potentials.

Findings

Close agreement with lattice QCD data for thermodynamic observables

No extra parameters needed compared to previous models

Model extension to finite chemical potentials is straightforward

Abstract

Thermodynamic properties of strongly interacting matter are investigated using the Polyakov loop enhanced Nambu$-$Jona-Lasinio model along with some modifications to include the hadrons. Various observables are shown to have a close agreement with the numerical data of QCD on lattice. The advantage of the present scheme over a similar study using a switching function is that here no extra parameters are to be fitted. As a result the present scheme can be easily extended for finite chemical potentials.