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

  • H.W. Huang
  • P. Kroll
  • T. Morii
Theoretical physics

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.

Keywords

Momentum Transfer Parton Distribution Compton Scattering Large Momentum Transverse Polarization 
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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2002

Authors and Affiliations

  • H.W. Huang
    • 1
  • P. Kroll
    • 2
  • T. Morii
    • 1
  1. 1.Faculty of Human Development, Kobe University, Nada, Kobe 657-8501, Japan JP
  2. 2.Fachbereich Physik, Universität Wuppertal, 42097 Wuppertal, Germany DE

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