Weak response of cold symmetric nuclear matter at three-body cluster level

TL;DR

This paper investigates the responses of cold symmetric nuclear matter using a dynamical model that incorporates three-body forces and correlations, revealing a weak response at the three-body cluster level.

Contribution

It introduces a unified dynamical model with three-body cluster terms to accurately account for three-nucleon forces in nuclear matter responses.

Findings

Weak response observed at three-body cluster level

Three-body forces modeled with UIX potential included

Unphysical dependence of weak operator removed

Abstract

We studied the Fermi and Gamow-Teller responses of cold symmetric nuclear matter within a unified dynamical model, suitable to account for both short- and long-range correlation effects. The formalism of correlated basis functions has been used to construct two-body effective interactions and one-body effective weak operators. The inclusion of the three-body cluster term allowed for incorporating in the effective interaction a realistic model of three- nucleon forces, namely the UIX potential. Moreover, the sizable unphysical dependence of the effective weak operator is removed once the three-body cluster term is taken into account.