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Transverse beam spin asymmetries in forward-angle elastic electron-proton scattering

  • D. S. Armstrong
  • , J. Arvieux
  • , R. Asaturyan
  • , T. Averett
  • , S. L. Bailey
  • , G. Batigne
  • , D. H. Beck
  • , E. J. Beise
  • , J. Benesch
  • , L. Bimbot
  • , J. Birchall
  • , A. Biselli
  • , P. Bosted
  • , E. Boukobza
  • , H. Breuer
  • , R. Carlini
  • , R. Carr
  • , N. Chant
  • , Y. C. Chao
  • , S. Chattopadhyay
  • R. Clark, S. Covrig, A. Cowley, D. Dale, C. Davis, W. Falk, J. M. Finn, T. Forest, G. Franklin, C. Furget, D. Gaskell, J. Grames, K. A. Griffioen, K. Grimm, B. Guillon, H. Guler, L. Hannelius, R. Hasty, A. Hawthorne Allen, T. Horn, K. Johnston, M. Jones, P. Kammel, R. Kazimi, P. M. King, A. Kolarkar, E. Korkmaz, W. Korsch, S. Kox, J. Kuhn, J. Lachniet, L. Lee, J. Lenoble, E. Liatard, J. Liu, B. Loupias, A. Lung, D. Marchand, J. W. Martin, K. W. McFarlane, D. W. McKee, R. D. McKeown, F. Merchez, H. Mkrtchyan, B. Moffit, M. Morlet, I. Nakagawa, K. Nakahara, R. Neveling, S. Ong, S. Page, V. Papavassiliou, S. F. Pate, S. K. Phillips, M. L. Pitt, M. Poelker, T. A. Porcelli, G. Quéméner, B. Quinn, W. D. Ramsay, A. W. Rauf, J. S. Real, J. Roche, P. Roos, G. A. Rutledge, J. Secrest, N. Simicevic, G. R. Smith, D. T. Spayde, S. Stepanyan, M. Stutzman, V. Sulkosky, V. Tadevosyan, R. Tieulent, J. Van De Wiele, W. T.H. Van Oers, E. Voutier, W. Vulcan, G. Warren, S. P. Wells, S. E. Williamson, S. A. Wood, C. Yan, J. Yun, V. Zeps
  • College of William and Mary
  • Université Paris Sud
  • A. Alikhanian Yerevan Institute of Physics
  • Université Joseph Fourier Grenoble 1
  • University of Illinois at Urbana-Champaign
  • University of Maryland, College Park
  • Thomas Jefferson National Accelerator Facility
  • University of Manitoba
  • Carnegie Mellon University
  • California Institute of Technology
  • University of Kentucky
  • TRIUMF
  • Louisiana Tech University
  • Virginia Tech
  • University of Northern British Columbia
  • University of Winnipeg
  • Hampton University
  • New Mexico State University
  • Grinnell College

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25(GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. An provides a direct probe of the imaginary component of the 2γ exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.

Original languageEnglish
Article number092301
JournalPhysical Review Letters
Volume99
Issue number9
DOIs
StatePublished - Aug 29 2007

Scopus Subject Areas

  • General Physics and Astronomy

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