Speaker: Chueng-Ryong Ji (North Carolina State University) 


Title: Extraction of GPDs from DVCS in Light-Front Dynamics

Abstract:
We discuss an issue of extracting the generalized parton 
distribution (GPD) from the deeply virtual Compton scattering 
(DVCS). We focus our discussion on the fermion propagator 
between the two photons in the handbag diagram taking the 
well-known kinematics frequently used in the light-front
dynamics (LFD). We compare the results between the full 
calculation of the tree level Compton scattering amplitude 
and the reduced calculation using the GPD formulation. We 
present the treacherous points in obtaining the agreement 
between the two results: one from the full calculation of 
the DVCS and the other from the reduced calculation of the 
GPD formulation. The utility of our calculation will be 
discussed.