Consequences of simultaneous chiral symmetry breaking and deconfinement for the isospin symmetric phase diagram

TL;DR

This paper explores the effects of simultaneous chiral symmetry breaking and deconfinement on the phase diagram of isospin symmetric quark matter, extending the vBag model to finite temperatures.

Contribution

It introduces an extension of the vBag model to finite temperatures and analyzes the resulting phase diagram for isospin symmetric matter.

Findings

Phase diagram at finite temperature shows new features.

Chiral symmetry breaking and deconfinement are linked in the model.

Results inform understanding of quark matter in heavy-ion collisions and astrophysics.

Abstract

The thermodynamic bag model (tdBag) has been applied widely to model quark matter properties in both heavy-ion and astrophysics communities. Several fundamental physics aspects are missing in tdBag, e.g., dynamical chiral symmetry breaking (D$\chi$SB) and repulsions due to the vector interaction are both included explicitly in the novel vBag quark matter model of Kl\"ahn and Fischer (2015) (Astrophys. J. 810, 134 (2015)). An important feature of vBag is the simultaneous D$\chi$SB and deconfinement, where the latter links vBag to a given hadronic model for the construction of the phase transition. In this article we discuss the extension to finite temperatures and the resulting phase diagram for the isospin symmetric medium.