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Article Dans Une Revue Physical Review Letters Année : 2018

New Measurement of the $1S-3S$ Transition Frequency of Hydrogen: Contribution to the Proton Charge Radius Puzzle

Résumé

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 9×10-13. The proton charge radius deduced from this measurement, rp=0.877(13)  fm, is in very good agreement with the current CODATA-recommended value. This result contributes to the ongoing search to solve the proton charge radius puzzle, which arose from a discrepancy between the CODATA value and a more precise determination of rp from muonic hydrogen spectroscopy.

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hal-01802047 , version 1 (07-10-2023)

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Hélène Fleurbaey, Sandrine Galtier, Simon Thomas, Marie Bonnaud, Lucile Julien, et al.. New Measurement of the $1S-3S$ Transition Frequency of Hydrogen: Contribution to the Proton Charge Radius Puzzle. Physical Review Letters, 2018, 120 (18), pp.183001. ⟨10.1103/PhysRevLett.120.183001⟩. ⟨hal-01802047⟩
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