The Rydberg constant and proton size from atomic hydrogen
2017; American Association for the Advancement of Science; Volume: 358; Issue: 6359 Linguagem: Inglês
10.1126/science.aah6677
ISSN1095-9203
AutoresAxel Beyer, Lothar Maisenbacher, Arthur Matveev, Randolf Pohl, K. Yu. Khabarova, Alexey Grinin, Tobias P. Lamour, D. C. Yost, Theodor W. Hänsch, N. Kolachevsky, Thomas Udem,
Tópico(s)Advanced Chemical Physics Studies
ResumoAt the core of the "proton radius puzzle" is a four-standard deviation discrepancy between the proton root-mean-square charge radii (rp) determined from the regular hydrogen (H) and the muonic hydrogen (µp) atoms. Using a cryogenic beam of H atoms, we measured the 2S-4P transition frequency in H, yielding the values of the Rydberg constant R∞ = 10973731.568076(96) per meterand rp = 0.8335(95) femtometer. Our rp value is 3.3 combined standard deviations smaller than the previous H world data, but in good agreement with the µp value. We motivate an asymmetric fit function, which eliminates line shifts from quantum interference of neighboring atomic resonances.
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