Proton radius from electron-proton scattering and chiral perturbation theory
Abstract
We determine the root-mean-square proton charge radius, Rp, from a fit to low-Q2 electron-proton elastic-scattering cross-section data with the higher moments fixed (within uncertainties) to the values predicted by chiral perturbation theory. We obtain Rp=0.855 (11 ) fm. This number falls between the value obtained from muonic hydrogen analyses and the CODATA value (based upon atomic hydrogen spectroscopy and electron-proton scattering determinations).
- Publication:
-
Physical Review C
- Pub Date:
- March 2017
- DOI:
- arXiv:
- arXiv:1610.09760
- Bibcode:
- 2017PhRvC..95c5203H
- Keywords:
-
- Nuclear Theory;
- High Energy Physics - Phenomenology;
- Nuclear Experiment;
- Physics - Atomic Physics
- E-Print:
- Updated to match published version, with minor numerical changes, and added and corrected references. Conclusions unchanged