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

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.

Comments: comments added; reference added