Evaluation of the proton charge radius from e-p scattering

Abstract

In light of the proton radius puzzle, the discrepancy between measurements of the proton charge radius from muonic hydrogen and those from electronic hydrogen and electron-proton scattering measurements, we reexamine the charge radius extractions from electron scattering measurements. We provide a recommended value for the proton RMS charge radius, $r_E=0.879\pm 0.011$ fm, based on a global examination of elastic e-p scattering data. The uncertainties include contributions to account for tension between different data sets and inconsistencies between radii using different extraction procedures.

arXiv commentProceedings from the 2015 Workshop on Fundamental Constants

Cited by in corpus (7)

• Extraction of the proton radius from electron-proton scattering data
• Measurement of two-photon exchange effect by comparing elastic $e^{\pm }p$ cross sections
• Review of experimental and theoretical status of the proton radius puzzle
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• Lepton universality test in the photoproduction of $e^{-}{e}^{+}$ versus ${\mu }^{-}{\mu }^{+}$ pairs on a proton target
• Lower bound on the proton charge radius from electron scattering data
• Comment on "Breakdown of the expansion of finite-size corrections to the hydrogen Lamb shift in moments of charge distribution"