Real Compton Scattering on Proton at High Momentum Transfers

The E99-114 experiment was carried out to measure the cross sections for Real Compton Scattering (RCS) on the proton in the kinematic range s=5−11 GeV2, −t=2−7 GeV2. In addition, a measurement of longitudinal and transverse polarization transfers was made at s=6.9 GeV2 and −t=4.0 GeV2. These measurements were done to test the existing theoretical mechanisms for this process and will possibly lead to the determination of RCS form factors which are related to the Generalized Parton Distributions (GPD). The experiment was conducted in Hall A of Thomas Jefferson National Accelerator Facility (Jefferson Lab). Final results of polarization transfer measurements are presented.