A measurement of the proton elastic form factors for 1 ≤ Q^2 ≤ 3 (GeV/c)^2
We report measurements of the proton form factors, G^p_E and G^p_M, extracted from elastic electron scattering in the range 1 ≤ Q^2 ≤ 3 (GeV/c)^2 with uncertainties of <15% in G^p_E and <3% in G^p_M. The results for G^p_E are somewhat larger than indicated by most theoretical parameterizati...
| Summary: | We report measurements of the proton form factors, G^p_E and G^p_M, extracted
from elastic electron scattering in the range 1 ≤ Q^2 ≤ 3 (GeV/c)^2 with uncertainties
of <15% in G^p_E and <3% in G^p_M. The results for G^p_E are somewhat larger than
indicated by most theoretical parameterizations. The ratio of Pauli and Dirac form
factors, Q^2(F^p_2/F^p_1), is lower in value and demonstrates less Q^2 dependence than
these parameterizations have indicated. Comparisons are made to theoretical models,
including those based on perturbative QCD, vector-meson dominance, QCD sum
rules, and diquark constituents to the proton. A global extraction of the form factors,
including previous elastic scattering measurements, is also presented. |
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