APS » PROLA » Phys. Rev. D » Volume 49 » Issue 11

Phys. Rev. D 49, 5671 - 5689 (1994)

Measurements of the proton elastic form factors for 1≤Q2≤3 (GeV/c)2 at SLAC
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R. C. Walker et al.
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Received 4 November 1993

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/abstract/PRD/v49/p5671
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.
Present address: Mitsubishi Electric Co., Kokusai Bldg, Rm 730, 3-1-1 Marunouchi, Chiyoda-ku, Tokyo 100, Japan.
a Present address: IN 2P3 - CNRS, Universites Paris VI et VII, Paris, France.
b Present address: Department of Physics, University of Texas, Austin, TX 78712.
c Present address: Stanford Linear Accelerator Center, Stanford, CA 94309.
d Present address: MEC Laboratory, Daikin Industries, Tsukuba, Japan 305.

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