QCD Phase Transition in a new Hybrid Model Formulation

TL;DR

This paper introduces a new hybrid model combining an excluded-volume hadron gas and a quasiparticle quark-gluon plasma to study the QCD phase diagram, successfully reproducing lattice QCD data and predicting phase boundaries at finite chemical potential.

Contribution

The paper presents a novel hybrid model for QCD matter that integrates a new excluded-volume hadron gas with a quasiparticle QGP, improving phase diagram predictions.

Findings

Reproduces lattice QCD data at zero baryon chemical potential

Predicts QCD phase boundary at finite chemical potential

Identifies potential critical point in the phase diagram

Abstract

Search of a proper and realistic equations of state (EOS) for strongly interacting matter used in the study of QCD phase diagram still appears as a challenging task. Recently, we have constructed a hybrid model description for the quark gluon plasma (QGP) as well as hadron gas (HG) phases where we use a new excluded-volume model for HG and a thermodynamically-consistent quasiparticle model for the QGP phase. We attempt to use them to get a QCD phase boundary and a critical point. We test our hybrid model by reproducing the entire lattice QCD data for strongly interacting matter at zero baryon chemical potential ($\mu_{B}$)and predict the results at finite $\mu_{B}$ and $T$.