Towards a microscopic understanding of nucleon polarizabilities

TL;DR

This paper develops a microscopic framework based on quark and gluon interactions within the covariant Faddeev approach to calculate nucleon polarizabilities, addressing gauge invariance issues and presenting preliminary results.

Contribution

It introduces a novel microscopic method for calculating nucleon polarizabilities directly from quark-gluon dynamics, bridging fundamental theory and observable quantities.

Findings

Preliminary nucleon polarizability results obtained.

Discussion of gauge invariance challenges in the framework.

Connection established between quark-level calculations and hadronic expansions.

Abstract

We outline a microscopic framework to calculate nucleon Compton scattering from the level of quarks and gluons within the covariant Faddeev approach. We explain the connection with hadronic expansions of the Compton scattering amplitude and discuss the obstacles in maintaining electromagnetic gauge invariance. Finally we give preliminary results for the nucleon polarizabilities.