Precision spectroscopy of 2S–nP transitions in atomic hydrogen for a new determination of the Rydberg constant and the proton charge radius

2015 ◽  
Vol T165 ◽  
pp. 014030 ◽  
Author(s):  
Axel Beyer ◽  
Lothar Maisenbacher ◽  
Ksenia Khabarova ◽  
Arthur Matveev ◽  
Randolf Pohl ◽  
...  
Keyword(s):  
Charge Radius ◽  
Atomic Hydrogen ◽  
Precision Spectroscopy ◽  
Proton Charge ◽  
Proton Charge Radius ◽  
Rydberg Constant

scholarly journals 2S-4S spectroscopy in hydrogen atom: The new value for the Rydberg constant and the proton charge radius

2018 ◽  
Author(s):  
N. Kolachevsky ◽  
A. Beyer ◽  
L. Maisenbacher ◽  
A. Matveev ◽  
R. Pohl ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Charge Radius ◽  
Proton Charge ◽  
Proton Charge Radius ◽  
Rydberg Constant

A measurement of the atomic hydrogen Lamb shift and the proton charge radius

Science ◽  
2019 ◽  
Vol 365 (6457) ◽  
pp. 1007-1012 ◽  
Author(s):  
N. Bezginov ◽  
T. Valdez ◽  
M. Horbatsch ◽  
A. Marsman ◽  
A. C. Vutha ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Charge Radius ◽  
Atomic Hydrogen ◽  
Lamb Shift ◽  
Shift Measurement ◽  
Proton Radius ◽  
Proton Charge ◽  
Proton Charge Radius ◽  
Proton Radius Puzzle

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.

The Lamb shift in muonic hydrogenThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.

2011 ◽  
Vol 89 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Randolf Pohl ◽  
Aldo Antognini ◽  
François Nez ◽  
Fernando D. Amaro ◽  
François Biraben ◽  
...  
Keyword(s):  
Charge Radius ◽  
Lamb Shift ◽  
Finite Size ◽  
Muonic Hydrogen ◽  
Energy Splitting ◽  
Atomic Systems ◽  
Proton Charge ◽  
Proton Charge Radius ◽  
Rydberg Constant ◽  
Better Than

The long quest for a measurement of the Lamb shift in muonic hydrogen is over. Last year we measured the 2S 1/2F=1 –2P 3/2F=2 energy splitting (Pohl et al., Nature, 466, 213 (2010)) in μp with an experimental accuracy of 15 ppm, twice better than our proposed goal. Using current QED calculations of the fine, hyperfine, QED, and finite size contributions, we obtain a root-mean-square proton charge radius of rp = 0.841 84 (67) fm. This value is 10 times more precise, but 5 standard deviations smaller, than the 2006 CODATA value of rp. The origin of this discrepancy is not known. Our measurement, together with precise measurements of the 1S–2S transition in regular hydrogen and deuterium, gives improved values of the Rydberg constant, R∞ = 10 973 731.568 160 (16) m–1 and the rms charge radius of the deuteron rd = 2.128 09 (31) fm.

Determination of the Proton Charge Radius by Different Methods

2019 ◽  
Vol 16 (5) ◽  
pp. 514-519 ◽  
Author(s):  
S. G. Karshenboim ◽  
V. G. Ivanov ◽  
S. I. Eidelman
Keyword(s):  
Charge Radius ◽  
Proton Charge ◽  
Proton Charge Radius

scholarly journals Determination of the proton charge radius from the study of the hydrogen S-energy levels

2020 ◽  
Vol 1690 ◽  
pp. 012080
Author(s):  
A E Dorokhov ◽  
R N Faustov ◽  
A P Martynenko ◽  
F A Martynenko
Keyword(s):  
Charge Radius ◽  
Energy Levels ◽  
Proton Charge ◽  
Proton Charge Radius
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