Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-05-25
Nucl.Phys.B540:58-86,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
31 pages, latex, 16 postscript figures
Scientific paper
10.1016/S0550-3213(98)00767-6
The complete QED corrections of O(alpha) to polarized Compton scattering are calculated for finite electron mass and including the real corrections induced by the processes e^- gamma -> e^- gamma gamma and e^- gamma -> e^- e^- e^+. All relevant formulas are listed in a form that is well suited for a direct implementation in computer codes. We present a detailed numerical discussion of the O(alpha)-corrected cross section and the left-right asymmetry in the energy range of present and future Compton polarimeters, which are used to determine the beam polarization of high-energetic e^+- beams. For photons with energies of a few eV and electrons with SLC energies or smaller, the corrections are of the order of a few per mille. In the energy range of future e^+e^- colliders, however, they reach 1-2% and cannot be neglected in a precision polarization measurement.
Denner Ansgar
Dittmaier Stefan
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