Article
Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements
Physical Review Letters
Document Type
Article
Article Version
Publisher's PDF
Publication Date
1-1-2001
Disciplines
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
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
None
Peer Reviewed
Citation Information
S. Stepanyan, Angela Biselli and CLAS Collaboration. "Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements" Physical Review Letters Vol. 87 Iss. 18 (2001) Available at: http://works.bepress.com/angela_biselli/72/