Two-loop image QED Bhabha scattering differential cross section Original Research Article

We calculate the two-loop virtual, UV renormalized corrections at order image in QED to the Bhabha scattering differential cross section, for arbitrary values of the squared c.m. energy s and momentum transfer t, and on-shell electrons and positrons of finite mass m. The calculation is carried out within the dimensional regularization scheme; the remaining IR divergences appear as polar singularities in image. The result is presented in terms of 1- and 2-dimensional harmonic polylogarithms, of maximum weight 3.