Proton charge and magnetic rms radii from the elastic $ep$ scattering data

Abstract

The elastic electron-proton scattering data are analysed in order to determine proton charge and magnetic rms radii, r_E and r_M. Along with the usual statistical error, we try to estimate a systematic error in the radii, caused by the inadequacy of particular form factor parameterization employed. The range of data to use in the analysis is chosen so as to minimize the total (statistical + systematic) error. We obtain r_E = 0.912 +- 0.009 (stat) +- 0.007 (syst) fm, and r_M = 0.876 +- 0.010 (stat) +- 0.016 (syst) fm. The cross-section data were corrected for two-photon exchange. We found that without such corrections obtained r_E and r_M are somewhat smaller while the quality of fit is worse.

6 pages, 4 figures. Numbers slightly changed due to discovered error in minimization program. Sec.III revised, discussion of G_E behaviour added.

References in corpus (8)

• Global analysis of proton elastic form factor data with two-photon exchange corrections
• On the rms-radius of the proton
• Dispersion analysis of the nucleon form factors including meson continua
• Two-photon exchange in elastic electron-nucleon scattering
• Two-photon exchange in dispersion approach
• Measurement of the Sigma^- Charge Radius by Sigma^- Electron Elastic Scattering
• Zemach and magnetic radius of the proton from the hyperfine splitting in hydrogen
• Two-photon exchange at low Q^2

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