An analytic parametrization of the hyperonic matter equation of state

TL;DR

This paper develops an analytic parametrization of the hyperonic matter equation of state based on microscopic calculations, enabling quick and accurate modeling for astrophysical and nuclear physics applications.

Contribution

It introduces a simple, accurate parametrization of the hyperonic matter equation of state derived from microscopic Brueckner-Hartree-Fock calculations with multiple hyperon-nucleon interaction models.

Findings

The parametrization reproduces microscopic results with high accuracy.

It allows rapid calculations of hyperonic matter properties.

The model is versatile across different hyperon-nucleon interactions.

Abstract

An analytic parametrization of the hyperonic matter equation of state based on microscopic Brueckner-Hartree-Fock calculations has been constructed using the realistic Argonne V18 nucleon-nucleon potential plus a three-body force of Urbana type, and three models of the hyperon-nucleon interaction: the Nijmegen soft-core models NSC89 and NSC97e, and the most recent meson-exchange potential of the Juelich group. The construction of this parametrization is based on a simple phase-space analysis and reproduces with good accuracy the results of the microscopic calculations with a small number of parameters. This parametrization allows for rapid calculations that accurately mimic the microscopic results, being therefore, very useful from a practical point of view.