Nonlocal Polyakov-Nambu-Jona-Lasinio model with wavefunction renormalization at finite temperature and chemical potential

TL;DR

This paper investigates the phase diagram of strongly interacting matter using a non-local Polyakov-Nambu-Jona-Lasinio model with wavefunction renormalization, analyzing critical points and exponents at finite temperature and chemical potential.

Contribution

It introduces a non-local SU(2) chiral quark model with wavefunction renormalization and Polyakov loop coupling, considering different form factors and lattice-inspired fits.

Findings

Identification of critical points in the phase diagram.

Determination of the Critical End Point position.

Analysis of critical exponents for various model parameters.

Abstract

We study the phase diagram of strongly interacting matter in the framework of a non-local SU(2) chiral quark model which includes wave function renormalization and coupling to the Polyakov loop. Both non-local interactions based on the frequently used exponential form factor, and on fits to the quark mass and renormalization functions obtained in lattice calculations are considered. Special attention is paid to the determination of the critical points, both in the chiral limit and at finite quark mass. In particular, we study the position of the Critical End Point as well as the value of the associated critical exponents for different model parameterizations.