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Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
- Source :
- Physical Review Letters, Physical Review Letters, 2006, 97, pp.262002. ⟨10.1103/PhysRevLett.97.262002⟩, DOE / OSTI, Physical Review Letters, American Physical Society, 2006, 97, pp.262002. ⟨10.1103/PhysRevLett.97.262002⟩
- Publication Year :
- 2006
- Publisher :
- American Physical Society (APS), 2006.
-
Abstract
- We present the first measurements of the \vec{e}p->epg cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q^2 dependence (from 1.5 to 2.3 GeV^2) 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 Q^2. The helicity-independent cross section is also measured at Q^2=2.3 GeV^2. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.<br />5 pages, 4 figures, 2 tables. Text shortened for publication. References added. One figure removed
- Subjects :
- Quark
Physics
Particle physics
010308 nuclear & particles physics
Compton scattering
FOS: Physical sciences
13.60.Fz, 13.40.Gp, 14.20.Dh, 13.60.Hb
General Physics and Astronomy
Parton
HERA
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
01 natural sciences
Helicity
0103 physical sciences
High Energy Physics::Experiment
Nuclear Experiment (nucl-ex)
Nuclear Experiment
010306 general physics
Nucleon
Linear combination
Scaling
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 97
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....d667f09b44d2abcdd4276ca700423ad1
- Full Text :
- https://doi.org/10.1103/physrevlett.97.262002