Journal
PHYSICS LETTERS B
Volume 816, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2021.136254
Keywords
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Funding
- NSFC
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [196253076 -TRR 110, 279384907 -CRC 1245, 12070131001]
- Chinese Academy of Sciences (CAS) through a President's International Fellowship Initiative (PIFI) [2018DM0034]
- VolkswagenStiftung [93562]
- EU [824093]
- German Federal Ministry of Education and Research (BMBF) [05P18RDFN1]
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Utilizing dispersion theory and an improved description of the two-pion continuum based on precise Roy-Steiner analysis of pion-nucleon scattering, recent data from electron-proton scattering was analyzed. This allowed for a high-precision determination of the electric and magnetic radius of the proton.
Using dispersion theory with an improved description of the two-pion continuum based on the precise Roy-Steiner analysis of pion-nucleon scattering, we analyze recent data from electron-proton scattering. This allows for a high-precision determination of the electric and magnetic radius of the proton, r(E) = (0.838(-0.004-0.003)(+0.005+0.004)) fm and r(M) = (0.847 +/- 0.004 +/- 0.004) fm, where the first error refers to the fitting procedure using bootstrap and the data while the second one refers to the systematic uncertainty related to the underlying spectral functions. (C) 2021 The Author(s). Published by Elsevier B.V.
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