ar X iv : h ep - p h / 01 06 22 8 v 1 2 1 Ju n 20 01 Spin effects in deeply virtual Compton scattering

نویسندگان

  • A. V. Belitsky
  • A. Kirchner
  • D. Müller
چکیده

We consider the azimuthal angle dependence in the cross section of the hard leptoproduction of a photon on a nucleon target. We show that this dependence allows to define observables that isolate the twist-two and twist-three sectors in the deeply virtual Compton scattering amplitude. All twist-two and twist-three Compton form factors can be extracted from measurements of the charge odd part of the polarized cross section and give access to all generalized parton distributions. We consider the azimuthal angle dependence in the cross section of the hard lep-toproduction of a photon on a nucleon target. We show that this dependence allows to define observables that isolate the twist-two and twist-three sectors in the deeply virtual Compton scattering amplitude. All twist-two and twist-three Compton form factors can be extracted from measurements of the charge odd part of the polarized cross section and give access to all generalized parton distributions.

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تاریخ انتشار 2001