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Finite-t and target mass corrections to DVCS on a scalar target

Using the formalism developed in [1,2] 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, ~t/Q^2, and target mass, ~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.

preprint2012arXivOpen access
V. M. BraunA. N. ManashovB. Pirnay
hep-ph
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V. M. BraunA. N. ManashovB. Pirnay

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