Hall A Annual Report 2012
Report over the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility.
physics.ins-det↗
arXiv subjects
the Hall A Collaboration
Publications and source records attributed to the Hall A Collaboration.
Compton Scattering Cross Section on the Proton at High Momentum Transfer
Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s = 5-11 and -t = 2-7 GeV2 with statistical accuracy of a few percent. The scaling power for the s-dependence of the cross section at fixed center of mass angle was found to be 8.0 +/ 0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark.
nucl-ex↗