[1801.08816] New measurement of the 1S-3S transition frequency of hydrogen: contribution to the proton charge radius puzzle
Abstract: We present a new measurement of the 1S-3S two-photon transition frequency of hydrogen, realized with a continuous-wave excitation laser at 205 nm on a room-temperature atomic beam, with a relative uncertainty of 9\times10^{-13}. The proton charge radius deduced from this measurement, r_\text{p}=0.877(13) fm, is in very good agreement with the current CODATA-recommended value.
Monday, July 23, 2018
New Measurement of Proton Radius 0.87fm Intensifies Proton Radius Puzzle
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