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Spin effects in deeply virtual Compton scattering
A. V. Belitsky, A. Kirchner, D. Müller
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 observabl…
Hard exclusive meson production at next-to-leading order
A. V. Belitsky, D. Müller
We evaluate perturbative next-to-leading order corrections to the hard exclusive leptoproduction of pi+ mesons on a transversely polarized proton target. A model dependent study sh…
Twist-three observables in deeply virtual Compton scattering on the nucleon
A. V. Belitsky, A. Kirchner, D. Müller +1
We study twist-three effects in deeply virtual Compton scattering on an unpolarized spin-1/2 target. A careful definition of observables as Fourier moments w.r.t. the azimuthal ang…
Resummation of target mass corrections in two-photon processes: twist-two sector
A. V. Belitsky, D. Müller
We develop a formalism for the resummation of target mass corrections in off-forward two-photon amplitudes given by a chronological product of electromagnetic currents, arising in…