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

The elastic electron–proton scattering data are analysed in order to determine proton charge and magnetic rms radii, image and image. 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 image and image. The cross-section data were corrected for two-photon exchange. We found that without such corrections obtained image and image are somewhat smaller while the quality of fit is worse.