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The Proton Elastic Form Factor Ratio at Low Momentum Transfer

Authors
  • Ron, G.
  • Glister, J.
  • Lee, B.
Type
Published Article
Publication Date
Nov 22, 2007
Submission Date
Jun 01, 2007
Identifiers
DOI: 10.1103/PhysRevLett.99.202002
Source
arXiv
License
Unknown
External links

Abstract

High precision measurements of the proton elastic form factor ratio have been made at four-momentum transfers, Q^2, between 0.2 and 0.5 GeV^2. The new data, while consistent with previous results, clearly show a ratio less than unity and significant differences from the central values of several recent phenomenological fits. By combining the new form-factor ratio data with an existing cross-section measurement, one finds that in this Q^2 range the deviation from unity is primarily due to GEp being smaller than the dipole parameterization.

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