Hybrid stars within the framework of the Sigma-Omega-Rho model combined with the MIT and NJL models

TL;DR

This study models hybrid stars with hadronic and quark matter using combined RMF, MIT, and NJL models, predicting maximum masses up to 2.07 solar masses through phase transition analysis.

Contribution

It integrates the Sigma-omega-rho RMF model with MIT and NJL quark models to analyze hybrid star structure and phase transitions.

Findings

Maximum star mass predicted is 2.07 solar masses.

Phase transition conditions are analyzed using Maxwell and Gibbs criteria.

The combined models provide insights into the star's mass-radius relation.

Abstract

In this paper, we investigate the structure of hybrid stars consisting of hadrons (neutrons, protons, sigmas, lambdas), leptons (electrons, muons), and quarks (up, down, strange). We use a relativistic mean-field (RMF) model namely the Sigma-omega-rho model for the hadronic phase and the MIT bag model as well as the NJL model for the quark phase. In addition, Maxwell and Gibbs conditions are employed to investigate the hadron-Quark phase transition. Finally, by obtaining the mass-radius relation, $ M (M_{sun}) \leqslant 2.07 $ is predicted for such hybrid stars.