Electromagnetic and Exotic Moments in Nuclear DFT

TL;DR

This paper explores electromagnetic and exotic moments in nuclei using nuclear DFT, comparing theoretical predictions with experimental data and discussing improvements in operator formulations.

Contribution

It provides a comprehensive analysis of nuclear multipole moments within DFT, including symmetry restoration and potential enhancements in magnetic operator modeling.

Findings

Theoretical multipole moments align with experimental data.

Inclusion of two-body meson-exchange improves magnetic dipole operators.

Exotic symmetry-breaking moments are crucial for understanding nuclear interactions.

Abstract

Electromagnetic interactions serve as essential probes for studying and testing our understanding of the atomic nucleus, as they reveal emergent properties across the nuclear chart. We analyse their corresponding observables, which relate to charge and current distributions in nuclei expressed through their multipole components. We focus on theoretical results obtained within nuclear density functional theory (DFT) to derive self-consistent, symmetry-restored nuclear wave functions along with their spectroscopic multipole moments. We demonstrate how these compare with experimental data. We also discuss potential improvements in the formulation of magnetic dipole operators by including two-body meson-exchange contributions. Discussions of exotic symmetry-breaking moments emphasise their importance for understanding fine details of fundamental nuclear interactions. Detailed derivations are provided in the accompanying Supplemental Material.