Møller scattering and weak neutral currents

Abstract
The differential cross section to order α3 for the process eeee is calculated in the soft-photon limit, for the case of colliding electron beams with transverse polarization. The effect due to neutral weak currents in unified gauge theories is also calculated and found to be less than 1% in the Weinberg-Salam model, unless the beam energy is larger than 10 GeV.