On the spin-isospin decomposition of nuclear symmetry energy

TL;DR

This paper analyzes the decomposition of nuclear symmetry energy into spin and isospin parts using Brueckner-Hartree-Fock theory, revealing the interplay of two-body channels and the effects of three-body forces across different densities.

Contribution

It introduces a detailed analysis of spin-isospin decomposition of nuclear symmetry energy within a consistent theoretical framework, considering three-body forces.

Findings

Interplay among isospin singlet and triplet channels.

Effects of three-body forces vary with density.

Insights into the properties of the NN bare interaction.

Abstract

The decomposition of nuclear symmetry energy into spin and isospin components is discussed to elucidate the underlying properties of the NN bare interaction. This investigation was carried out in the framework of the Brueckner-Hartree-Fock theory of asymmetric nuclear matter with consistent two and three body forces. It is shown the interplay among the various two body channels in terms of isospin singlet and triplet components as well as spin singlet and triplet ones. The broad range of baryon densities enables to study the effects of three body force moving from low to high densities.