Quark-Meson Coupling Model, Nuclear Matter Constraints and Neutron Star Properties

TL;DR

This paper investigates the quark-meson coupling model's equation of state for nuclear matter, incorporating Fock terms, to better understand neutron star properties and satisfy phenomenological constraints.

Contribution

It introduces a comprehensive analysis of the quark-meson coupling model with Fock terms, applying it to neutron star properties without extra parameters.

Findings

Model constrains nuclear matter parameters.

Predicts neutron star maximum mass and radii.

Aligns with phenomenological constraints.

Abstract

We explore the equation of state for nuclear matter in the quark-meson coupling model, including full Fock terms. The comparison with phenomenological constraints can be used to restrict the few additional parameters appearing in the Fock terms which are not present at Hartree level. Because the model is based upon the in-medium modification of the quark structure of the bound hadrons, it can be applied without additional parameters to include hyperons and to calculate the equation of state of dense matter in beta-equilibrium. This leads naturally to a study of the properties of neutron stars, including their maximum mass, their radii and density profiles.