Nucleon Form Factors in a Light-Cone Quark Model with Two-Photon Exchange

TL;DR

This paper estimates two-photon exchange corrections to proton and neutron electromagnetic observables using a relativistic light cone quark model, finding small magnitudes but strong angular dependence, consistent with simple hadronic models.

Contribution

It introduces a relativistic light cone quark model to evaluate two-photon exchange corrections, highlighting angular dependence and agreement with hadronic models.

Findings

Corrections are small in magnitude at fixed momentum transfer.

Corrections exhibit strong angular dependence.

Results align with simple hadronic models in moderate momentum transfer regions.

Abstract

We estimate the two-photon exchange corrections to both proton and neutron electromagnetic physical observables in a relativistic light cone quark model. At a fixed momentum transfer the corrections are found to be small in magnitudes, but with a strong angular dependence. Our results are comparable to those from simple hadronic model in a moderate momentum transfer region.