Zusammenfassung
Using the recently developed formalism we carry out the first complete calculation of kinematic power corrections to the helicity amplitudes of deeply-virtual Compton scattering to the twist-four accuracy for a study case of a (pseudo) scalar target. Our main result is that both finite-t, similar to t/Q(2), and target mass, similar to m(2)/Q(2), twist-four kinematic power corrections turn out to ...
Zusammenfassung
Using the recently developed formalism we carry out the first complete calculation of kinematic power corrections to the helicity amplitudes of deeply-virtual Compton scattering to the twist-four accuracy for a study case of a (pseudo) scalar target. Our main result is that both finite-t, similar to t/Q(2), and target mass, similar to m(2)/Q(2), twist-four kinematic power corrections turn out to be factorizable, at least to the leading order in the strong coupling. The structure of these corrections is discussed and a short model study of their numerical impact is presented.
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