Radiative Corrections to Fixed Target Møller Scattering Including Hard Bremsstrahlung Effects

We present a calculation of the complete O (α) electroweak radiative corrections to the Mller scattering process e−e − ! e−e−, including hard bremsstrahlung contri-butions. We study the eects of these corrections on both the total cross section and polarization asymmetry measured in low energy xed target experiments. Numerical results are presented for the experimental cuts relevant for E-158, a xed target e−e− experiment being performed at SLAC; the eect of hard bremsstrahlung is to shift the measured polarization asymmetry by +4%. We briefly discuss the remaining theo-retical uncertainty in the prediction for the low energy Mller scattering polarization asymmetry. ∗Work supported by the Department of Energy, Contract DE-AC03-76SF00515