Speaker
Description
Generalized Parton Distributions (GPDs) describe the correlation between the spatial distribution of the quarks and its longitudinal momentum fraction. Their definition in the mid-1990s has revolutionized our approach to the description of the internal structure of the nucleon. The study of the GPDs is at the forefront of today’s hadronic physics enterprise.
Deeply Virtual Compton Scattering (DVCS) off the nucleon ($\gamma^* N \rightarrow \gamma N $) is the simplest process sensitive to the GPDs. It has been measured at Hera, Compass, and JLab. In this talk, I will review the results of the Hall A-C @ JLab scheme. In these experiments, an EM calorimeter is used in coincidence with a well-known high-resolution spectrometer. This relatively simple scheme allows for precise (\~ 5\%) measurements of absolute beam polarized and unpolarized cross-sections essential for studying GPDS. I will show DVCS results off proton and neutrons target as well as results on exclusive pion production of those same targets.
