NLO QED Corrections to Hard-Bremsstrahlung Emission in Bhabha Scattering

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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8 pages, 5 figures, v2 minor changes: comments and references added, matches PLB version

Scientific paper

10.1016/j.physletb.2009.11.035

In this paper we present a numerical implementation of the one-loop QED corrections to the hard-bremsstrahlung process e- e+ \to e- e+ gamma. These corrections can be included in the Monte Carlo event generators employed for simulating Bhabha scattering events at low-energy high-luminosity electron-positron colliders. The calculation is performed by employing the reduction method developed by Ossola, Papadopoulos and Pittau. Our results are implemented in a modular code for the numerical evaluation of the scattering amplitudes for any given phase-space point. In a similar way, we also evaluate the one-loop QED corrections to e- e+ \to mu- mu+ gamma, which represents an interesting application of the method in the presence of two different mass scales in the loops.

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