QED correction to the radiative tail from the elastic peak in deep inelastic scattering - art. no. 053016

We calculate the deep inelastic scattering (DIS) cross section under kinema tical requirements when a final hadron state is a single proton. The proces s in the lowest order is known as the radiative tail from the elastic peak. We take into account the correction, coming from the emission of virtual a nd soft real photons, to the amplitude of this process as well as the one i nduced by the emission of an additional hard photon and a hard pair. The re sulting contributions of these channels are presented in the leading and, p artly, next-to-leading logarithmic approximations. Some general expressions for the photon contributions are given. Numerical results are presented fo r kinematical conditions of the current experiments in DIS.