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Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Region at Backward Angles
- Source :
- Physical Review C, Physical Review C, American Physical Society, 2009, 79, pp.015201. ⟨10.1103/PhysRevC.79.015201⟩, Physical Review C, 2009, 79, pp.015201. ⟨10.1103/PhysRevC.79.015201⟩, Lund University
- Publication Year :
- 2009
- Publisher :
- HAL CCSD, 2009.
-
Abstract
- We have made the first measurements of the virtual Compton scattering (VCS) process via the H$(e,e'p)\gamma$ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the $W$-dependence at fixed $Q^2=1$ GeV$^2$, and for the $Q^2$-dependence at fixed $W$ near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed $Q^2$-dependence is smooth. The measured ratio of H$(e,e'p)\gamma$ to H$(e,e'p)\pi^0$ cross sections emphasizes the different sensitivity of these two reactions to the various nucleon resonances. Finally, when compared to Real Compton Scattering (RCS) at high energy and large angles, our VCS data at the highest $W$ (1.8-1.9 GeV) show a striking $Q^2$- independence, which may suggest a transition to a perturbative scattering mechanism at the quark level.<br />Comment: 20 pages, 8 figures. To appear in Phys.Rev.C
- Subjects :
- Elastic scattering
Physics
Nuclear and High Energy Physics
Particle physics
010308 nuclear & particles physics
Scattering
Compton scattering
Resonance
FOS: Physical sciences
Inelastic scattering
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Deep inelastic scattering
01 natural sciences
High Energy Physics - Experiment
Nuclear physics
High Energy Physics - Experiment (hep-ex)
Pion
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Nuclear Experiment (nucl-ex)
010306 general physics
Nucleon
Nuclear Experiment
Subjects
Details
- Language :
- English
- ISSN :
- 24699985 and 24699993
- Database :
- OpenAIRE
- Journal :
- Physical Review C, Physical Review C, American Physical Society, 2009, 79, pp.015201. ⟨10.1103/PhysRevC.79.015201⟩, Physical Review C, 2009, 79, pp.015201. ⟨10.1103/PhysRevC.79.015201⟩, Lund University
- Accession number :
- edsair.doi.dedup.....d28ed5de054a51eef6e2e8c48ba5e9e2
- Full Text :
- https://doi.org/10.1103/PhysRevC.79.015201⟩