Exact O(alpha) Corrections to the Single Hard Bremsstrahlung Process in   Low Angle Bhabha Scattering in the SLC/LEP Energy Regime
  We present the exact O(alpha) correction to the process e+ e- -> e+ e- + gamma in the low angle luminosity regime at SLC/LEP energies. We give explicit formulas for the completely differential cross section. As an important application, we illustrate the size of the respective corrections of O(alpha^2) to the SLC/LEP luminosity cross section. We show explicitly that our results have the correct infrared limit, as a cross-check. Some comments are made about the implementation of our results in the framework of a Monte Carlo event generator. This latter implementation will appear elsewhere. 
S. Jadach, M. Melles, B.F.L. Ward, S.A. Yost