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/Q^2, m^2/Q^2 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.

Invited talk at the 33rd Erice school on nuclear physics, Erici, 16-24 September 2011, Italy

References in corpus (5)

• Exclusive electroproduction revisited: treating kinematical effects
• Baryon Operators of Higher Twist in QCD and Nucleon Distribution Amplitudes
• Kinematic power corrections in off-forward hard reactions
• Target mass and finite $t$ corrections to diffractive deeply inelastic scattering
• Target mass and finite momentum transfer corrections to unpolarized and polarized diffractive scatterin

Cited by in corpus (1)

• Kinematical higher-twist corrections in ${\gamma }^{\ast }\to M_1{M}_2\gamma$: Neutral meson production