Published December 31, 2006
| Version v1
Journal article
Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
Creators
- Camacho, C. Munoz1
- Beaumel, M.1
- Garcon, M.1
- Guichon, P. A. M.1
- Sabatie, F.1
- Camsonne, A.2
- Ferdi, C.2
- Brossard, M.2
- Fieschi, J.-M.2
- Laveissiere, G.2
- Michel, B.2
- Mazouz, M.3
- Guillon, B.3
- Real, J.-S.3
- Voutier, E.3
- Gavalian, G.4
- Amarian, M.4
- Hayes, D.4
- Hyde-Wright, C. E.4
- Ibrahim, H.4
- and others
- Jefferson Lab Hall A Collaboration
- 1. CEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette (France)
- 2. Universite Blaise Pascal/CNRS-IN2P3, F-63177 Aubiere (France)
- 3. Laboratoire de Physique Subatomique et de Cosmologie, 38026 Grenoble (France)
- 4. Old Dominion University, Norfolk, Virginia 23508 (United States)
Description
We present the first measurements of the e(vector sign)p→epγ cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q2 dependence (from 1.5 to 2.3 GeV2) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q2. The helicity-independent cross section is also measured at Q2=2.3 GeV2. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.97.262002;
- arXiv
- arXiv:nucl-ex/0607029v2;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 97
- Journal Issue
- 26
- Journal Page Range
- p. 262002-262002.5
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38024504
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- APPROXIMATIONS; COMPTON EFFECT; CROSS SECTIONS; DISTRIBUTION; HELICITY; QUARKS
- Descriptors DEC
- BASIC INTERACTIONS; CALCULATION METHODS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; FERMIONS; INTERACTIONS; PARTICLE PROPERTIES; SCATTERING
Optional Information
- Notes
- (c) 2006 The American Physical Society
- Collaborations
- Jefferson Lab Hall A Collaboration