Finite-t and target mass corrections in off-forward hard reactions
Abstract
We describe a systematic approach [1] to the calculation of kinematic corrections ~ t/Q2, m2/Q2 in hard exclusive processes which involve momentum transfer from the initial to the final hadron state. As an example, the complete expression is derived for the time-ordered product of two electromagnetic currents that includes all kinematic corrections due to the quark distribution to twist-four accuracy. The results are applicable e.g. to the studies of deeply-virtual Compton scattering.
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