Soft and hard photon corrections for μ-pair production and Bhabha scattering in the presence of a resonance

In this paper previous calculations of radiative corrections to μ-pair production and Bhabha scattering are extended to the case where a resonance is present. In contrast to other investigations of radiative corrections to a narrow resonance this paper gives a complete discussion of Bhabha scattering, and discusses both for μ-pair production and Bhabha scattering, hard photon bremsstrahlung taking into account specific experimental conditions. (Auth.)