Nucleon polarizabilities and Delta-resonance magnetic moment in chiral EFT

TL;DR

This paper discusses recent chiral EFT calculations of nucleon polarizabilities, highlights issues in empirical determinations, and reports progress in measuring the Delta-resonance magnetic moment via photon-proton interactions.

Contribution

It presents new insights into nucleon polarizabilities and advances in measuring the Delta-resonance magnetic moment using experimental data.

Findings

Chiral EFT calculations reveal issues in empirical proton polarizability data.

Progress in measuring the Delta(1232) magnetic moment at MAMI.

Identification of discrepancies in current empirical determinations.

Abstract

Recent chiral EFT calculations of nucleon polarizabilities reveal a problem in the current empirical determination of proton's electromagnetic polarizabilities. We also report on the progress in the empirical determination of the $\Delta$(1232)-resonance magnetic moment in the process of $\gamma p \to p \pi^0 \gamma'$ measured at MAMI.