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The electron current tensor for the scattering of heavy photon onlongitudinally polarized electron accompanied with additional hardelectron-positron pair has been considered. The contribution of collinear andsemicollinear kinematics is computed. The full analysis of both, spin-dependentand spin-independend parts of electron current tensor, is performed. Theobtained result allows to calculate the corresponding contribution into thesecond order radiative correction to cross-sections of different processes withthe next-to-leading accuracy.Comment: 19p,2Fig. (Submitted to Journ.of Physics G

Current tensor with a heavy photon for pair production by a longitudinally polarized electron