Proton charge and magnetic rms radii from the elastic ep scattering data
✍ Scribed by Dmitry Borisyuk
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 199 KB
- Volume
- 843
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
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.