Perturbative and non-perturbative QCD corrections to wide-angle Compton scattering

Details Perturbative and non-perturbative QCD corrections to wide-angle Compton scattering Perturbative and non-perturbative QCD corrections to wide-angle Compton scattering

2001-10-16

arxiv.org/abs/hep-ph/0110208v1

Eur.Phys.J.C23:301-310,2002; Erratum-ibid.C31:279,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 9 figures (using LATEX with epsfig)

Scientific paper

10.1007/s100520100883

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 QCD 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 are non-zero although small.

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