QCD-inspired determination of NJL model parameters

TL;DR

This paper uses renormalization group methods to determine the temperature-dependent parameters of QCD-inspired models, aiming to enhance their predictive accuracy for the QCD phase diagram at finite temperature and density.

Contribution

It introduces a method to derive low-energy model parameters directly from QCD using renormalization group arguments, including their temperature dependence.

Findings

Initial results show temperature dependence of model parameters

Method can incorporate effects of finite quark chemical potential

Potential to improve QCD phase diagram predictions

Abstract

The QCD phase diagram at finite temperature and density has attracted considerable interest over many decades now, not least because of its relevance for a better understanding of heavy-ion collision experiments. Models provide some insight into the QCD phase structure but usually rely on various parameters. Based on renormalization group arguments, we discuss how the parameters of QCD low-energy models can be determined from the fundamental theory of the strong interaction. We particularly focus on a determination of the temperature dependence of these parameters in this work and comment on the effect of a finite quark chemical potential. We present first results and argue that our findings can be used to improve the predictive power of future model calculations.