A measurement of the atomic hydrogen Lamb shift and the proton charge radius
2019
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Abstract: (submitter)
The surprising discrepancy between results from different methods for measuring the proton charge radius is referred to as the proton radius puzzle. In particular, measurements using electrons seem to lead to a different radius compared with those using muons. Here, a direct measurement of the n = 2 Lamb shift of atomic hydrogen is presented. Our measurement determines the proton radius to be rp = 0.833 femtometers, with an uncertainty of ±0.010 femtometers. This electron-based measurement of rp agrees with that obtained from the analogous muon-based Lamb shift measurement but is not consistent with the larger radius that was obtained from the averaging of previous electron-based measurements.- p: charge radius
- electron p: elastic scattering
- p: size
- measurement methods
- experimental results
- energy: transition
- hydrogen: muonic atom
- hydrogen: energy levels
- charged particle: interaction
- Lamb shift
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