Nucleon effective masses within the Brueckner-Hartree-Fock theory: Impact on stellar neutrino emission

TL;DR

This paper calculates neutron and proton effective masses in dense nuclear matter using Brueckner-Hartree-Fock theory and examines how these affect neutrino emission in neutron stars, highlighting the influence of nuclear interactions.

Contribution

It provides new microscopic calculations of nucleon effective masses and their impact on neutrino emissivity, including parametrizations and interaction dependence.

Findings

Significant in-medium suppression of neutrino emissivities

Dependence of suppression on nucleon-nucleon interactions

Provision of useful parametrizations for modeling

Abstract

We calculate the effective masses of neutrons and protons in dense nuclear matter within the microscopic Brueckner-Hartree-Fock many-body theory and study the impact on the neutrino emissivity processes of neutron stars. We compare results based on different nucleon-nucleon potentials and nuclear three-body forces. Useful parametrizations of the numerical results are given. We find substantial in-medium suppression of the emissivities, strongly dependent on the interactions.