Non-empirical pairing energy functional in nuclear matter and finite nuclei

TL;DR

This paper develops a non-empirical pairing energy functional for nuclear matter and finite nuclei, analyzing the dependence of pairing gaps on interaction types and self-energy approximations.

Contribution

It introduces a consistent approach to pairing interactions in nuclear systems, emphasizing the weak dependence on approximation schemes for low-momentum interactions.

Findings

Pairing gaps from low-momentum interactions are weakly dependent on self-energy approximations.

Hard potentials' pairing gaps are highly sensitive to effective-mass schemes.

The study enhances understanding of pairing correlations in nuclear matter and finite nuclei.

Abstract

We study 1S0 pairing gaps in neutron and nuclear matter as well as in finite nuclei on the basis of microscopic two-nucleon interactions. Special attention is paid to the consistency of the pairing interaction and normal self-energy contributions. We find that pairing gaps obtained from low-momentum interactions depend only weakly on approximation schemes for the normal self-energy, required in present energy-density functional calculations, while pairing gaps from hard potentials are very sensitive to the effective-mass approximation scheme.