Extraction of the Compton Form Factor H from DVCS Measurements in the Quark Sector

Details Extraction of the Compton Form Factor H from DVCS Measurements in the Quark Sector Extraction of the Compton Form Factor H from DVCS Measurements in the Quark Sector

2010-10-21

arxiv.org/abs/1010.4521v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures, Plenary talk given at the 12th International Conference on Meson-Nucleon Physics and the Structure of the

Scientific paper

Working at twist 2 accuracy and assuming the dominance of the Generalized Parton Distribution H we study the helicity-dependent and independent cross sections measured in Hall A, the beam spin asymmetries measured in Hall B at Jefferson Laboratory and beam charge, beam spin and target spin asymmetries measured by Hermes. We extract the real and imaginary parts of the Compton Form Factor H, the latter being obtained with a 20--50% uncertainty. We pay extra attention to the estimation of systematic errors on the extraction of H. We discuss our results and compare to other extractions as well as to the popular VGG model.

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