Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2009-09-19
JHEP 0911:083,2009
Physics
High Energy Physics
High Energy Physics - Experiment
21 pages, 5 Figures, and 5 Tables
Scientific paper
10.1088/1126-6708/2009/11/083
Hard exclusive leptoproduction of real photons from an unpolarized proton target is studied in an effort to elucidate generalized parton distributions. The data accumulated during the years 1996--2005 with the HERMES spectrometer are analyzed to yield asymmetries with respect to the combined dependence of the cross section on beam helicity and charge, thereby revealing previously unseparated contributions from deeply virtual Compton scattering and its interference with the Bethe--Heitler process. The integrated luminosity is sufficient to show correlated dependences on two kinematic variables, and provides the most precise determination of the dependence on only the beam charge.
Airapetian A.
collaboration The HERMES
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