Modified MIT Bag Models -- part II: QCD phase diagram and hot quark stars

TL;DR

This paper uses modified MIT bag models with vector and self-interacting terms to explore the QCD phase diagram and properties of hot quark stars, comparing results with observational data and other models.

Contribution

It introduces modified MIT bag models incorporating vector fields and self-interactions to study hot quark matter and the QCD phase diagram, including implications for quark star properties.

Findings

Analysis of two-flavored quark matter at phase transitions

Calculation of quark star macroscopic properties

Comparison with Nambu-Jona-Lasinio model results

Abstract

In the present work we use the modified versions of the MIT bag model, on which both a vector field and a self-interacting term are introduced, to obtain hot quark matter and to investigate the QCD phase diagram. We first analyze two-flavored quark matter constrained to both the freeze-out and the liquid-gas phase transition at the hadronic phase. Later, three-flavored quark matter subject to $\beta$ equilibrium and charge neutrality is used to compute quark star macroscopic properties, which are confronted with recent observational massive and canonical star radius results. Finally, a comparison with QCD phase diagrams obtained from the Nambu-Jona-Lasinio model is performed.