QED radiative corrections to low-energy Møller and Bhabha scattering

We present a treatment of the next-to-leading-order radiative corrections to unpolarized Møller and Bhabha scattering without resorting to ultrarelativistic approximations. We extend existing soft-photon radiative corrections with new hard-photon bremsstrahlung calculations so that the effect of photon emission is taken into account for any photon energy. This formulation is intended for application in the OLYMPUS experiment and the upcoming DarkLight experiment but is applicable to a broad range of experiments at energies where QED is a sufficient description.United States. Dept. of Energy. Office of Nuclear Physics (DE-FG02-94ER40818)United States. Dept. of Energy. Office of Nuclear Physics (DE-NA0002135