We give a general treatment of twist-three effects in two-photon reactions. We address the issue of the gauge invariance of the Compton amplitude in generalized Bjorken kinematics and relations of twist-three 'transverse' skewed parton distributions to twist-two ones and interaction dependent three-particle correlation functions. Finally, we discuss leading order evolution of twist-three functions and their impact on the deeply virtual Compton scattering.
- Deeply virtual Compton scattering
- Skewed parton distribution
- Twist-three contributions
- Two-photon processes
ASJC Scopus subject areas
- Nuclear and High Energy Physics