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Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering

Authors :
L. Lee
G. Batigne
S. Covrig
D. McKee
K. A. Griffioen
R. Kazimi
W. D. Ramsay
L. Bimbot
J. Lachniet
C. Furget
Bryan J. Moffit
Glen A. Warren
K. Johnston
E. Voutier
A. Hawthorne Allen
G. Quéméner
R. Carr
S. E. Williamson
P. Kammel
T. Averett
J. Van de Wiele
S. Stepanyan
B. Guillon
W. Falk
E. Liatard
D. Marchand
P. G. Roos
B. Loupias
M. Morlet
E. J. Beise
K. W. McFarlane
J. S. Real
A. A. Cowley
T. Horn
J. Lenoble
S. Wells
J. Kuhn
Neven Simicevic
V. Sulkosky
T. A. Forest
H. Guler
W. T. H. van Oers
E. Boukobza
Y. C. Chao
K. Nakahara
H. Breuer
J. M. Finn
M. Poelker
R. Neveling
J. Grames
D. T. Spayde
J. Arvieux
J. W. Martin
R. Asaturyan
C. Yan
S. Kox
Douglas H Beck
G. A. Rutledge
A. Kolarkar
J. Yun
R. D. McKeown
Raphael Noel Tieulent
L. Hannelius
P. M. King
S. K. Phillips
A. S. Biselli
D. S. Dale
I. Nakagawa
W. F. Vulcan
Subhasis Chattopadhyay
J. A. Secrest
J. Roche
V. Zeps
M. K. Jones
S. A. Wood
R. Hasty
E. Korkmaz
S. A. Page
Michael Pitt
F. Merchez
S. L. Bailey
C. A. Davis
N. S. Chant
D. S. Armstrong
G. R. Smith
K. Grimm
J. Birchall
S. Ong
S. F. Pate
H. Mkrtchyan
D. Gaskell
R. Clark
T. A. Porcelli
V. Papavassiliou
J. Benesch
A. Lung
M. Stutzman
Jin Liu
P. Bosted
G. B. Franklin
Wolfgang Korsch
A. W. Rauf
R. D. Carlini
B. P. Quinn
V. Tadevosyan
Institut de Physique Nucléaire d'Orsay (IPNO)
Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Laboratoire de Physique Subatomique et de Cosmologie (LPSC)
Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
Thomas Jefferson National Accelerator Facility (Jefferson Lab)
G0
Source :
Physical Review Letters, Physical Review Letters, American Physical Society, 2007, 99, pp.092301. ⟨10.1103/PhysRevLett.99.092301⟩
Publication Year :
2007
Publisher :
American Physical Society, 2007.

Abstract

We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely-polarized 3 GeV electrons from unpolarized protons at Q^2 = 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. A_n provides a direct probe of the imaginary component of the 2-gamma exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.<br />5 pages, 3 figures, submitted to Physical Review Letters; shortened to meet PRL length limit, clarified some text after referee's comments

Details

Language :
English
ISSN :
00319007 and 10797114
Database :
OpenAIRE
Journal :
Physical Review Letters, Physical Review Letters, American Physical Society, 2007, 99, pp.092301. ⟨10.1103/PhysRevLett.99.092301⟩
Accession number :
edsair.doi.dedup.....c5367e715c0b903bb043d1df4f3fddec