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

Stepanyan, S.; Fissum, Kevin LU ; Zhou, Z. and , (2001) In Physical Review Letters 87(18). p.182002-182002
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.
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
87
issue
18
pages
182002 - 182002
publisher
American Physical Society
external identifiers
  • scopus:85037215478
ISSN
1079-7114
DOI
10.1103/PhysRevLett.87.182002
language
English
LU publication?
no
id
5d8b3a02-b093-4611-9108-5c084c55df59
date added to LUP
2019-06-24 11:39:20
date last changed
2019-08-17 02:18:36
@article{5d8b3a02-b093-4611-9108-5c084c55df59,
  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.},
  author       = {Stepanyan, S. and Fissum, Kevin and Zhou, Z. and , },
  issn         = {1079-7114},
  language     = {eng},
  number       = {18},
  pages        = {182002--182002},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.87.182002},
  volume       = {87},
  year         = {2001},
}