The compact expressions for cross sections of photoproduction of a pair of
charged particles e+,e−; μ+,μ−; π+,π− as
well as the double Compton scattering process are given. The explicit analytic
expressions for the case of polarized photon and the initial electron in the
kinematics when all the particles can be considered as a massless ones are
presented. The photon polarization is described in the terms of Stokes
parameters.Comment: LaTeX2e, 9 page