Susceptibilities in the PNJL model with 8q interactions and comparison with lQCD

TL;DR

This paper investigates the phase transitions in an extended PNJL model with 6 and 8 quark interactions, comparing the results with lattice QCD data to understand the role of higher-order interactions in QCD phase structure.

Contribution

It introduces an extended NJL model with 8-quark interactions and compares its predictions with lattice QCD results, highlighting the importance of OZI-violating terms.

Findings

8-quark interactions improve agreement with lattice QCD

Location of the critical endpoint is sensitive to 8-quark terms

Moderately strong OZI-violating interactions are favored

Abstract

We present some results pertaining quantities which are regarded as good indicators of the pseudo-critical temperatures for the deconfinement and partial chiral restoration transitions using a polynomial form for the Polyakov potential part and an extended version of the NJL model which includes 6 and 8 quark interaction terms. Some comparisons with results from the lattice formulation of QCD (lQCD) are performed and results for the location of the critical endoint in the phase diagram are also presented. It is shown that the comparison with lQCD results favors a moderately strong OZI-violating 8 quark interaction term.