Document Type

Article

Article Version

Publisher's PDF

Publication Date

1-1-2006

Abstract

The longitudinal target-spin asymmetry AUL for the exclusive electroproduction of high-energy photons was measured for the first time in ep⃗ →e′pγ. The data have been accumulated at JLab with the CLAS spectrometer using 5.7 GeV electrons and a longitudinally polarized NH3 target. A significant azimuthal angular dependence was observed, resulting from the interference of the deeply virtual Compton scattering and Bethe-Heitler processes. The amplitude of the sin ϕ moment is 0.252±0.042stat±0.020sys. Theoretical calculations are in good agreement with the magnitude and the kinematic dependence of the target-spin asymmetry, which is sensitive to the generalized parton distributions H˜ and H.

Comments

Copyright American Physical Society Publisher final version available at http://prl.aps.org/abstract/PRL/v97/i7/e072002

Publication Title

Physical Review Letters

Published Citation

Chen, S., et al. "Measurement of deeply virtual compton scattering with a polarized-proton target." Physical review letters 97.7 (2006): 072002. DOI: 10.1103/PhysRevLett.97.072002

DOI

10.1103/PhysRevLett.97.072002

Peer Reviewed

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