Impact of QCD sum rules coupling constants on neutron stars structure

TL;DR

This paper investigates how QCD sum rules-derived coupling constants influence neutron star structure, including hyperonic matter effects, mass-radius relations, and tidal deformability, aligning theoretical models with observational data.

Contribution

It introduces the use of QCD sum rules coupling constants in relativistic models to analyze hyperonic neutron star properties, enhancing the understanding of their internal composition.

Findings

Good agreement with observational data on mass-radius relations

Hyperonic matter significantly affects neutron star properties

QCD sum rules coupling constants improve modeling accuracy

Abstract

We present a detailed investigation on the structure of neutron stars, incorporating the presence of hyperons within a relativistic model under the mean-field approximation. Employing coupling constants derived from QCD sum rules, we explore the particle fraction in beta equilibrium and establish the mass-radius relationship for neutron stars with hyperonic matter. Additionally, we compute the stellar Love number ($\mathcal{K}_{2}$) and the tidal deformability parameter ($\varLambda$), providing valuable insights into the dynamical properties of these celestial objects. Through comparison with theoretical predictions and observational data, our results exhibit good agreement, affirming the validity of our approach. These findings contribute significantly to refining the understanding of neutron star physics, particularly in environments containing hyperons, and offer essential constraints on the equation of state governing such extreme astrophysical conditions.