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Single--Spin Asymmetries in the Bethe--Heitler Process $e^- + p \to e^- + γ+ p$ from QED Radiative Corrections

Andrei V. Afanasev·M. I. Konchatnij·N. P. Merenkov
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Abstract

We derived analytic formulae for the polarization single--spin asymmetries (SSA) in the Bethe--Heitler process $e^- + p \to e^- + γ+ p$. The asymmetries arise due to one-loop QED radiative corrections to the leptonic part of the interaction and present a systematic correction for the studies of virtual Compton Scattering on a proton through interference with the Bethe-Heitler amplitude. Considered are SSA with either longitudinally polarized electron beam or a polarized proton target. The computed effect appears to be small, not exceeding 0.1 per cent for kinematics of current virtual Compton scattering experiments.

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Andrei V. Afanasev, M. I. Konchatnij, N. P. Merenkov. 2005-07-05. Single--Spin Asymmetries in the Bethe--Heitler Process $e^- + p \to e^- + γ+ p$ from QED Radiative Corrections. https://doi.org/10.1134/s1063776106020038

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