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-$t$, $\sim t/Q^2$, and target mass, $\sim m^2/Q^2$, 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.

• Received 18 May 2012

DOI:https://doi.org/10.1103/PhysRevD.86.014003