Abstract.
We investigate corrections to the handbag approach for wide-angle Compton scattering off protons at moderately large momentum transfer: the photon–parton subprocess is calculated to next-to-leading order in \(\alpha_{\mathrm{s}}\) and contributions from the generalized parton distribution E are taken into account. Photon and proton helicity flip amplitudes are non-zero due to these corrections, which leads to a wealth of polarization phenomena in Compton scattering. Thus, for instance, the incoming photon asymmetry or the transverse polarization of the proton is non-zero, although small.
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Received: 31 October 2001 / Revised version: 11 December 2001 / Published online: 8 February 2002
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Huang, H., Kroll, P. & Morii, T. Perturbative and non-perturbative QCD corrections to wide-angle Compton scattering. Eur. Phys. J. C 23, 301–310 (2002). https://doi.org/10.1007/s100520100883
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DOI: https://doi.org/10.1007/s100520100883