A new Skyrme interaction with improved spin-isospin properties

TL;DR

This paper introduces a new Skyrme interaction model that improves the description of spin-isospin properties in nuclei, enhancing the accuracy of nuclear excitation predictions relevant for astrophysics and fundamental physics.

Contribution

The paper presents a novel Skyrme interaction with enhanced spin-isospin properties, accurately describing various nuclear resonances and supporting applications in astrophysics and double-beta decay research.

Findings

Accurately describes Gamow-Teller Resonance in multiple nuclei.

Matches experimental data for Isobaric Analog and Spin Dipole Resonances.

Maintains comparable performance in finite nuclei and nuclear matter properties.

Abstract

A correct determination of the spin-isospin properties of the nuclear effective interaction should lead, among other improvements, to an accurate description of the Gamow-Teller Resonance (GTR). These nuclear excitations impact on a variety of physical processes: from the response in charge-exchange reactions of nuclei naturally present in the Earth, to the description of the stellar nucleosynthesis, and of the pre-supernova explosion core-collapse evolution of massive stars in the Universe. A reliable description of the GTR provides also stringent tests for neutrinoless double-$\beta$ decay calculations. We present a new Skyrme interaction as accurate as previous forces in the description of finite nuclei and of uniform matter properties around saturation density, and that account well for the GTR in ${}^{48}$Ca, ${}^{90}$Zr and ${}^{208}$Pb, the Isobaric Analog Resonance and the Spin Dipole Resonance in ${}^{90}$Zr and ${}^{208}$Pb.