Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-02-18
JHEP 0806:066,2008
Physics
High Energy Physics
High Energy Physics - Experiment
24 pages, 10 figures, 2 tables; 1 figure,3 references added, slight text change
Scientific paper
10.1088/1126-6708/2008/06/066
Azimuthal asymmetries in exclusive electroproduction of real photons are measured for the first time with respect to transverse target polarisation, providing new constraints on Generalized Parton Distributions. From the same data set on a hydrogen target, new results for the beam-charge asymmetry are also extracted with better precision than those previously reported. By comparing model calculations with measured asymmetries attributed to the interference between the deeply virtual Compton scattering and Bethe-Heitler processes, a model-dependent constraint is obtained on the total angular momenta carried by up and down quarks in the nucleon.
Airapetian A.
HERMES Collaboration
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