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A measurement of the proton elastic form factors for 1 ≤ Q^2 ≤ 3 (GeV/c)^2


Walker, Robert Christian David (1989) A measurement of the proton elastic form factors for 1 ≤ Q^2 ≤ 3 (GeV/c)^2. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/1j3p-xf48.


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.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Filippone, Bradley W.
Thesis Committee:
  • Unknown, Unknown
Defense Date:20 February 1989
Record Number:CaltechTHESIS:10242013-084941401
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8007
Deposited By: Benjamin Perez
Deposited On:24 Oct 2013 16:47
Last Modified:16 Apr 2021 22:20

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