Symmetric nuclear matter with chiral three-nucleon forces in the self-consistent Green's functions approach

TL;DR

This paper investigates symmetric nuclear matter using chiral nuclear forces within the Self-Consistent Green's Functions framework, highlighting the significant impact of three-body forces on nuclear saturation properties and single-particle characteristics.

Contribution

It introduces a method to incorporate three-nucleon forces into the SCGF approach via effective interactions, improving the description of nuclear matter saturation.

Findings

Three-body forces significantly improve saturation properties.

Saturation properties depend on the SRG evolution scale.

Single-particle properties are affected by three-body forces.

Abstract

We present calculations for symmetric nuclear matter using chiral nuclear interactions within the Self-Consistent Green's Functions approach in the ladder approximation. Three-body forces are included via effective one-body and two-body interactions, computed from an uncorrelated average over a third particle. We discuss the effect of the three-body forces on the total energy, computed with an extended Galitskii-Migdal-Koltun sum-rule, as well as on single-particle properties. Saturation properties are substantially improved when three-body forces are included, but there is still some underlying dependence on the SRG evolution scale.