How Well Do We Know the Electromagnetic Form Factors of the Proton?

Abstract

Recent measurements of recoil polarization in elastic scattering have been used to extract the ratio of the electric to the magnetic proton form factors. These results disagree with Rosenbluth extractions from cross section measurements, indicating either an inconsistency between the two techniques, or a problem with either the polarization transfer or cross section measurements. To obtain precise knowledge of the proton form factors, we must first understand the source of this discrepancy.

5 pages, 4 figures; Invited talk at Electron-Nucleus Scattering VII, Elba, Italy, June 2002 (to appear in proceedings)

References in corpus (1)

• The ratio of proton's electric to magnetic form factors measured by polarization transfer

Cited by in corpus (5)

• Two-photon exchange in elastic electron-proton scattering
• A Study of the Quasi-elastic (e,e'p) Reaction on ${}^{12}$C, ${}^{56}$Fe and ${}^{97}$Au
• Quasielastic axial-vector mass from experiments on neutrino-nucleus scattering
• All electromagnetic form factors
• Logarithmic corrections and soft photon phenomenology in the multipole model of the nucleon form factors