Phys. Rev. D
49,
5671–5689
(1994)
Measurements of the proton elastic form factors for 1≤Q2≤3 (GeV/c)2 at SLAC
R. C. Walker et al.
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R. C. Walker*, B. W. Filippone, J. Jourdan†, R. Milner‡, R. McKeown, and D. Potterveld§
California Institute of Technology, Pasadena, California 91125
L. Andivahis, R. Arnold, D. Benton**, P. Bosted, G. deChambrier, A. Lung††, S. E. Rock, and Z. M. Szalata
The American University, Washington, D.C. 20016
A. Para
Fermi National Accelerator Laboratory, Batavia, Illinois 60510
F. Dietrich and K. Van Bibber
Lawrence Livermore National Laboratory, Livermore, California 94550
J. Button-Shafer, B. Debebe, and R. S. Hicks
University of Massachusetts, Amherst, Massachusetts 01003
S. Dasu‡‡, P. de Barbaro, A. Bodek, H. Haradaa, M. W. Krasnyb, K. Langc, and E. M. Riordand
University of Rochester, Rochester, New York 14627
R. Gearhart and L. W. Whitlowe
Stanford Linear Accelerator Center, Stanford, California 94305
J. Alster
University of Tel-Aviv, Ramat Aviv, Tel-Aviv 69978, Israel
Received 4 November 1993; published in the issue dated 1 June 1994
We report measurements of the proton form factors GEp and GMp extracted from elastic scattering in the range 1≤Q2≤3 (GeV/c)2 with total uncertainties < 15% in GEp and < 3% in GMp. Comparisons are made to theoretical models, including those based on perturbative QCD, vector-meson dominance, QCD sum rules, and diquark constituents in the proton. The results for GEp are somewhat larger than indicated by most theoretical parametrizations, and the ratios of the Pauli and Dirac form factors Q2(F2p/F1p) are lower in value and demonstrate a weaker Q2 dependence than those predictions. A global extraction of the elastic form factors from several experiments in the range 0.1 0.1<Q2<10 (GeV/c)2 is also presented.
© 1994 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.49.5671
DOI:
10.1103/PhysRevD.49.5671
PACS:
13.40.Gp, 12.38.Qk, 13.60.Fz, 14.20.Dh
*Present address: Department of Physics, University of Rochester, Rochester, NY 14627. †Present address: Department of Physics, CH-4056, Basel, Switzerland. ‡Present address: Department of Physics, MIT, Cambridge, MA 02138. §Present address: Argonne National Laboratory, Argonne, IL 60439-4843. **Present address: Department of Physics, University of Pennsylvania, Philadelphia, PA 19104. ††Present address: California Institute of Technology, Pasadena, CA 91125. ‡‡Present address: Department of Physics, University of Wisconsin, Madison WI 53706. aPresent address: Mitsubishi Electric Co., Kokusai Bldg, Rm 730, 3-1-1 Marunouchi, Chiyoda-ku, Tokyo 100, Japan. bPresent address: IN 2P3 - CNRS, Universites Paris VI et VII, Paris, France. cPresent address: Department of Physics, University of Texas, Austin, TX 78712. dPresent address: Stanford Linear Accelerator Center, Stanford, CA 94309. ePresent address: MEC Laboratory, Daikin Industries, Tsukuba, Japan 305.
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