Proton radius from electron-proton scattering and chiral perturbation theory

Marko Horbatsch, Eric A. Hessels, Antonio Pineda

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)


© 2017 American Physical Society. 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).
Original languageEnglish
Article number035203
JournalPhysical Review C
Issue number3
Publication statusPublished - 13 Mar 2017


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