Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements
(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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https://lup.lub.lu.se/record/5d8b3a02-b093-4611-9108-5c084c55df59
- author
- Stepanyan, S. ; Fissum, Kevin LU and Zhou, Z.
- author collaboration
- publishing date
- 2001
- 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
- project
- Elastic and Virtual Compton Scattering and Nucleon Polarizabilities
- Investigations of and with Polarized Electromagnetic Beams
- language
- English
- LU publication?
- no
- id
- 5d8b3a02-b093-4611-9108-5c084c55df59
- date added to LUP
- 2019-06-24 11:39:20
- date last changed
- 2022-03-25 21:03:39
@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.}}, 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}}, doi = {{10.1103/PhysRevLett.87.182002}}, volume = {{87}}, year = {{2001}}, }