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

An electromagnetic calorimeter for the JLab real compton scattering experiment

A lead–glass hodoscope calorimeter that was constructed for use in the Jefferson Lab Real Compton Scattering experiment is described. The detector provides a measurement of the coordinates and the energy of scattered photons in the GeV energy range with resolutions of 5 mm and 6%/View the MathML source. Features of both the detector design and its performance in the high luminosity environment during the experiment are presented