Quark meson coupling model with $su(3)$ symmetry within the Bogoliubov independent quark model of the nucleon

TL;DR

This paper extends the Bogoliubov quark-meson coupling model to include hyperons with $su(3)$ symmetry, predicting neutron star properties such as mass and radius with improved theoretical consistency.

Contribution

It introduces a generalized model incorporating hyperons with fixed and fitted meson couplings, enhancing the description of dense nuclear matter.

Findings

Predicts neutron stars with masses above 2 solar masses

Estimates the radius of a 1.4 solar mass neutron star as 13.83 km

Provides a consistent hyperon-inclusive equation of state

Abstract

We generalize the Bogoliubov quark-meson coupling model to also include hyperons. The hyperon-$\sigma$-meson couplings are fixed by the model and the hyperon-$\omega$-meson couplings are fitted to the hypreon potentials in symmetric nuclear matter. The present model predicts neutron stars with masses above 2$M_\odot$ and the radius of a 1.4$M_\odot$ star equal to 13.83 km.