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Phys. Rev. D 49, 5671–5689 (1994)

Measurements of the proton elastic form factors for 1Q23 (GeV/c)2 at SLAC

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R. C. Walker et al.
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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 1Q23 (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