Document Type

Article

Article Version

Publisher's PDF

Publication Date

1-1-2008

Abstract

The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e⃗ p→epγ) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (xB from 0.11 to 0.58, Q2 from 1 to 4.8  GeV2, −t from 0.09 to 1.8  GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A~asinϕ/(1+ccosϕ). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

Comments

Copyright American Physical Society Publisher final version available at http://prl.aps.org/abstract/PRL/v100/i16/e162002

Publication Title

Physical Review Letters

Published Citation

F. X. Girod et al. [CLAS Collaboration], "Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries," Physical Review Letters 100.16 (2008) DOI: 10.1103/PhysRevLett.100.162002

DOI

10.1103/PhysRevLett.100.162002

Peer Reviewed

Download

Share

COinS