The effect of dynamical quark mass in the calculation of strange quark star structure

TL;DR

This paper investigates how density-dependent dynamical quark masses influence the equation of state and structure of strange quark stars, using NJL and MIT bag models with one-gluon-exchange interactions.

Contribution

It introduces a dynamical mass approach within the MIT bag model and compares it with QCD interactions, improving the modeling of strange quark star properties.

Findings

Dynamical quark masses lower the predicted gravitational mass of strange quark stars.

The dynamical approach improves the equation of state calculations.

Inclusion of one-gluon-exchange interaction provides a more realistic quark interaction model.

Abstract

We have discussed dynamical behavior of strange quark matter components, in particular the effects of density dependent quark mass on the equation of state of strange quark matter. Dynamical masses of quarks have been computed within Nambu-Jona-Lasinio (NJL) model, then we have done the strange quark matter calculations employing the MIT bag model with these dynamical masses. For the sake of comparing dynamical mass interaction with QCD quark-quark interaction, we have considered the one-gluon-exchange term as the effective interaction between quarks for MIT bag model. Our dynamical approach illustrates an improvement for the obtained values of equation of state. We have also investigated the structure of strange quark star using Tolman-Oppenheimer-Volkoff (TOV) equations for all applied models. Our results show that the dynamical mass interaction leads to lower values for the gravitational mass.