Towards thermodynamics of the quark quasi-particles

TL;DR

This paper explores the thermodynamics of quark quasi-particles within a model that predicts phase transitions and mixed phases, providing insights into chiral symmetry restoration and quark droplet formation.

Contribution

It introduces a thermodynamic framework for quark quasi-particles based on the Nambu-Jona-Lasinio model, highlighting phase transition phenomena.

Findings

Identification of a phase transition similar to nuclear liquid-gas transition

Estimation of surface tension coefficient for the transition layer

Discussion of quark droplet formation possibilities

Abstract

Some features of hot and dense gas of quarks which are considered as the quasi-particles of the model Hamiltonian with four-fermion interaction are studied. Being adapted to the Nambu-Jona-Lasinio model this approach allows us to accommodate a phase transition similar to the nuclear liquid-gas one at the proper scale and to argue an existence of the mixed phase of vacuum and normal baryonic matter as a plausible scenario of chiral symmetry (partial) restoration. Analyzing the transition layer between two phases we estimate the surface tension coefficient and discuss the possibility of quark droplet formation.