Light-front interpretation of Proton Generalized Polarizabilities

TL;DR

This paper extends a formalism to analyze how proton quark charge densities deform under external electric fields, using generalized polarizabilities to reveal induced polarization structures at large transverse distances.

Contribution

It introduces a method to connect proton generalized polarizabilities with light-front quark charge density deformations under external electric fields.

Findings

Pronounced structure in induced polarization at large transverse distances.

Potential for high-precision experiments to refine these measurements.

Abstract

We extend the recently developed formalism to extract light-front quark charge densities from nucleon form factor data to the deformations of these quark charge densities when applying an external electric field. We show that the resulting induced polarizations can be extracted from proton generalized polarizabilities. The available data for the generalized electric polarizabilitiy of the proton yield a pronounced structure in its induced polarization at large transverse distances, which will be pinned down by forthcoming high precision virtual Compton scattering experiments.