Abstract:
The present status of the theoretical description of the deep inelastic scattering of leptons off protons with account for radiative corrections (RCs) in the leading and next-to-leading approximations are reviewed. For the process ep → epγ along with RC coming from the emission of virtual, soft, and additional hard photons, it has been considered an e+e- pair production in the leading approximation. The Compton tensor with a heavy photon in the case of a longitudinally polarized electron is presented. A cross section for a special experimental setup with the tagging of an additional hard photon is given to the nonleading order. A similar consideration is carried out for a cross channel, namely, electron-positron annihilation into hadrons with the emission of a hard photon by initial leptons. The details of calculations are given in the appendices. Copyright © 2001 by Akushevich, Kuraev, Shaikhatden.
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