title: Kinematic power corrections in off-forward hard reactions.
abstract: We develop a general approach to the calculation of kinematic corrections ∝t/Q(2), m(2)/Q(2) in hard processes which involve momentum transfer from the initial to the final hadron state. As the principal result, the complete expression is derived for the time-ordered product of two electromagnetic currents that includes all kinematic corrections to twist-four accuracy. The results are immediately applicable, e.g., to the studies of deeply virtual Compton scattering.
authors.affiliation: Institut für Theoretische Physik, Universität Regensburg, Germany.
authors.forename: V M
authors.initials: VM
authors.lastname: Braun
authors.forename: A N
authors.initials: AN
authors.lastname: Manashov