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A Measurement of the Proton Elastic Form Factors for 1 ≤ Q² ≤ 3 (GeV/c)²


Walker, Robert Christian David (1989) A Measurement of the Proton Elastic Form Factors for 1 ≤ Q² ≤ 3 (GeV/c)². Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/1j3p-xf48.


We report measurements of the proton form factors, GᵖE and GᵖM, extracted from elastic electron scattering in the range 1 ≤ Q² ≤ 3 (GeV/c)² with uncertainties of < 15% in GᵖE and < 3% in GᵖM. The results for GᵖE are somewhat larger than indicated by most theoretical parameterizations. The ratio of Pauli and Dirac form factors, Q²(Fᵖ₂/Fᵖ₁), is lower in value and demonstrates less Q² 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:
  • Filippone, Bradley W. (chair)
  • Barish, Barry C.
  • Frautschi, Steven C.
  • Prince, Thomas A.
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:07 Jan 2022 20:08

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