Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements

Authors

S. Stepanyan
Angela Biselli, Fairfield UniversityFollow
CLAS Collaboration

Document Type

Article

Article Version

Publisher's PDF

Publication Date

1-1-2001

Abstract

We report the first results of the beam-spin asymmetry measured in the reaction ep→epγ at a beam energy of 4.25 GeV. A large asymmetry with a sinφ modulation is observed, as predicted for the interference term of deeply virtual compton scattering (DVCS) and the Bethe-Heitler process. The amplitude of this modulation is α=0.202±0.028. In leading-order and leading-twist perturbative QCD, the α is directly proportional to the imaginary part of the DVCS amplitude.

Comments

Copyright American Physical Society Publisher final version available at http://prl.aps.org/pdf/PRL/v87/i18/e182002

Publication Title

Physical Review Letters

Repository Citation

Stepanyan, S.; Biselli, Angela; and CLAS Collaboration, "Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements" (2001). Physics Faculty Publications. 104.
https://digitalcommons.fairfield.edu/physics-facultypubs/104

Published Citation

S. Stepanyan et al. [CLAS Collaboration], "Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements", Physical Review Letters 87.18 (2001) DOI: 10.1103/PhysRevLett.87.182002

DOI

10.1103/PhysRevLett.87.182002

Peer Reviewed