Contribution of Δ(1232) to real photon radiative corrections for elastic electron–proton scattering

Here we consider the contribution of the Δ(1232) resonance to the real photon radiative corrections for elastic ep-scattering. The effect is found to be small for past experiments studying the unpolarized cross section, as well as for the recent VEPP-3 experiment investigating two-photon exchange effects by the precision measurement of the -scattering cross section ratio.