Single-spin asymmetries in the Bethe-Heitler process e- + p → e- + γ + p induced by loop corrections

The single-spin beam and target asymmetries in the hard electroproduction process e(-) + p -> e(-) + gamma + p induced by the loop radiative corrections to the vertex part of lepton interaction are considered. The physical reason for the appearance of such asymmetries is the nonzero imaginary part of the amplitude (on the level of radiative corrections) caused by diagrams with photon radiation from the outgoing electron. We calculate the single-spin beam and target asymmetries at a longitudinally polarized electron beam or at arbitrary polarizations of the target proton for the CLAS and HERMES experimental conditions.