The amplitude of the deeply virtual Compton scattering off nucleon is computed to the twist-3 accuracy in the Wandzura-Wilczek (WW) approximation. The result is presented in the form which can be easily used for the analysis of DVCS observables.
@article{arxiv.hep-ph/0010150,
title = {DVCS on the nucleon to the twist-3 accuracy},
author = {N. Kivel and M. V. Polyakov},
journal= {arXiv preprint arXiv:hep-ph/0010150},
year = {2009}
}