Virtual Compton scattering and neutral pion electroproduction in the resonance region up to the deep inelastic region at backward angles
Name
Laveissiere-2009-Virtual Compton scat.pdf
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Checksum (MD5)
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Author(s)
Zhou, Z. -L.
Zhao, J.
Suleiman, R.
Rowntree, D.
Liyanage, N.
Gilad, Shalev
Gao, J.
Gao, Haiyan
Fissum, K. G.
Bertozzi, William
Date Issued
January 2009
Journal
Physical Review C
Publisher
American Physical Society
Citation
Jefferson Lab Hall A Collaboration et al. “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 (2009): 015201. © 2009 The American Physical Society.
Version
Final published version
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 Q[superscript 2] =1 GeV[superscript 2] and for the Q[superscript 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[superscript 2] 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 Q[superscript 2] independence, which may suggest a transition to a perturbative scattering mechanism at the quark level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevC.79.015201
