Asymmetric nuclear matter based on chiral two- and three-nucleon interactions

TL;DR

This paper develops an improved framework for calculating properties of asymmetric nuclear matter using chiral two- and three-nucleon interactions, providing detailed energy and saturation property analyses.

Contribution

It introduces a novel normal-ordering method to incorporate general 3N interactions in nuclear matter calculations based on chiral effective field theory.

Findings

Calculated energy per particle for various isospin asymmetries.

Analyzed saturation properties and incompressibility.

Provided an analytic parametrization of energy as a function of density and asymmetry.

Abstract

We calculate the properties of isospin-asymmetric nuclear matter based on chiral nucleon-nucleon (NN) and three-nucleon (3N) interactions. To this end, we develop an improved normal-ordering framework that allows to include general 3N interactions starting from a plane-wave partial-wave-decomposed form. We present results for the energy per particle for general isospin asymmetries based on a set of different Hamiltonians, study their saturation properties, the incompressibility, symmetry energy, and also provide an analytic parametrization for the energy per particle as a function of density and isospin asymmetry.