Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region Up to the Deep Inelastic Region at Backward Angles

Authors

G. Laveissiere
N. Degrande
S. Jaminion
C. Jutier, Old Dominion University
L. Todor, Old Dominion University
G. E. Dodge, Old Dominion UniversityFollow
C. E. Hyde, Old Dominion UniversityFollow
K. McCormick, Old Dominion University
P. E. Ulmer, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
Jefferson Lab Hall A Collaboration

Document Type

Article

Publication Date

2009

DOI

10.1103/PhysRevC.79.015201

Publication Title

Physical Review C

Volume

79

Issue

1

Pages

015201 (18 pages)

Abstract

We have made the first measurements of the virtual Compton scattering (VCS) process via the H(e, e′p)γ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the W-dependence at fixed Q²=1 GeV² and for the Q² dependence at fixed W near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed Q² dependence is smooth. The measured ratio of H(e, e′p)γ to H(e, e′p)π⁰ 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 Q² independence, which may suggest a transition to a perturbative scattering mechanism at the quark level.

Comments

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©2009 The American Physical Society

Original Publication Citation

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., . . . Jefferson Lab Hall, A. C. (2009). Virtual compton scattering and neutral pion electroproduction in the resonance region up to the deep inelastic region at backward angles. Physical Review C, 79(1), 015201. doi:10.1103/PhysRevC.79.015201

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0001-5416-2900 (Weinstein)

Repository Citation

Laveissiere, G.; Degrande, N.; Jaminion, S.; Jutier, C.; Todor, L.; Dodge, G. E.; Hyde, C. E.; McCormick, K.; Ulmer, P. E.; Weinstein, L. B.; and Jefferson Lab Hall A Collaboration, "Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region Up to the Deep Inelastic Region at Backward Angles" (2009). Physics Faculty Publications. 337.
https://digitalcommons.odu.edu/physics_fac_pubs/337