Perturbative and non-perturbative QCD corrections to wide-angle Compton scattering |
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Authors: | H.W. Huang P. Kroll T. Morii |
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Affiliation: | Faculty of Human Development, Kobe University, Nada, Kobe 657-8501, Japan, JP Fachbereich Physik, Universit?t Wuppertal, 42097 Wuppertal, Germany, DE
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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 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. Received: 31 October 2001 / Revised version: 11 December 2001 / Published online: 8 February 2002 |
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