Published January 1, 2007
| Version v1
Journal article
Beam-charge azimuthal asymmetry and deeply virtual Compton scattering
Creators
- Airapetian, A.1
- Deconinck, W.1
- Lorenzon, W.1
- Akopov, N.2
- Akopov, Z.2
- Avakian, R.2
- Avetissian, A.2
- Elbakian, G.2
- Gharibyan, V.2
- Marukyan, H.2
- Rostomyan, A.2
- Taroian, S.2
- Amarian, M.2, 3
- Andrus, A.4
- Bailey, P.4
- Bouwhuis, M.4
- Linden-Levy, L. A.4
- Makins, N. C. R.4
- Rubin, J.4
- Aschenauer, E. C.3
- and others
- HERMES Collaboration
- 1. Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)
- 2. Yerevan Physics Institute, 375036 Yerevan (Armenia)
- 3. DESY, 15738 Zeuthen (Germany)
- 4. Department of Physics, University of Illinois, Urbana, Illinois 61801-3080 (United States)
Description
The first observation of an azimuthal cross section asymmetry with respect to the charge of the incoming lepton beam is reported from a study of hard exclusive electroproduction of real photons. The data have been accumulated by the HERMES experiment at DESY, in which the HERA 27.6 GeV electron or positron beam scattered off an unpolarized hydrogen gas target. The observed asymmetry is attributed to the interference between the Bethe-Heitler process and the deeply virtual Compton scattering (DVCS) process. The interference term is sensitive to DVCS amplitudes, which provide the most direct access to generalized parton distributions
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.75.011103;
- arXiv
- arXiv:hep-ex/0605108v3;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 75
- Journal Issue
- 1
- Journal Page Range
- p. 011103-011103.5
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38090706
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ASYMMETRY; COMPTON EFFECT; CROSS SECTIONS; DESY; ELECTRON BEAMS; ELECTROPRODUCTION; GEV RANGE 10-100; HERA STORAGE RING; HYDROGEN; INTERFERENCE; PHOTONS; POSITRON BEAMS
- Descriptors DEC
- ACCELERATORS; BASIC INTERACTIONS; BEAMS; BOSONS; CYCLIC ACCELERATORS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; GEV RANGE; INTERACTIONS; LEPTON BEAMS; MASSLESS PARTICLES; NONMETALS; PARTICLE BEAMS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; SCATTERING; STORAGE RINGS; SYNCHROTRONS
Optional Information
- Notes
- (c) 2007 The American Physical Society
- Collaborations
- HERMES Collaboration