Model-independent extraction of the proton charge radius from electron scattering

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159 Scopus citations


Constraints from analyticity are combined with experimental electron-proton scattering data to determine the proton charge radius. In contrast to previous determinations, we provide a systematic procedure for analyzing arbitrary data without model-dependent assumptions on the form-factor shape. We also investigate the impact of including electron-neutron scattering data, and ππ→NN̄ data. Using representative data sets we find rEp=0.870±0.023±0.012fm using just proton scattering data; rEp=0.880-0.020+0.017±0.007fm adding neutron data; and rEp=0.871±0.009±0.002±0.002fm adding ππ data. The analysis can be readily extended to other nucleon form factors and derived observables.

Original languageEnglish
Article number113005
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number11
StatePublished - Dec 3 2010

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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