Tagged-photon events in polarized DIS process
  Deep-inelastic events for the scattering of the longitudinally polarized electron by polarized proton with tagged collinear photon radiated from initial-state electron are considered. The corresponding cross-section is derived in the Born approximation. The model-independent radiative corrections to the Born cross-section are also calculated. Obtained result is applied to the case of elastic scattering. 
G.I. Gakh, M.I. Konchatnij, and N.P. Merenkov