Delta(1232) contribution to real photon radiative corrections for elastic electron-proton scattering

TL;DR

This paper evaluates the impact of the Delta(1232) resonance on real photon radiative corrections in elastic electron-proton scattering, finding the effect to be minimal for past and recent experiments.

Contribution

It introduces the calculation of Delta(1232) resonance contributions to radiative corrections in elastic ep-scattering, a previously less explored aspect.

Findings

Delta(1232) contribution is small for unpolarized cross section measurements.

The effect is negligible for the VEPP-3 two-photon exchange experiment.

Radiative corrections from Delta(1232) do not significantly alter experimental results.

Abstract

Here we consider a contribution of Delta(1232) resonance to real photon radiative corrections for elastic $ep$-scattering. The effect is found to be small for past experiments to study unpolarized cross section as well as for the recent VEPP-3 experiment to investigate two-photon exchange effects by precision measurement of $e^\pm p$-scattering cross sections ratio.