The DOI matches its Crossref record; 14 of the 14 references it cites were found in a registry or an index.
A measurement of the atomic hydrogen Lamb shift and the proton charge radius
Abstract
Unraveling the proton puzzle: The discrepancy between the proton size deduced from the Lamb shift in muonic hydrogen and the average, textbook value based on regular (electronic) hydrogen has puzzled physicists for nearly a decade. One possible resolution could be that electrons interact with protons in a different way than muons do, which would require “new physics.” Bezginov et al. measured the Lamb shift in electronic hydrogen, which allowed for a direct comparison to the Lamb shift measured in muonic hydrogen. The two results agreed, but the discrepancy with the averaged value remains. Science , this issue p. 1007
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
The quantum theory of the electron
Dirac, P. A. M. (1928) · Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character · doi:10.1098/rspa.1928.0023 · Cited by 3,657
CODATA recommended values of the fundamental physical constants: 2010
Mohr, P. J., Taylor, B. N., & Newell, D. B. (2012) · Reviews of Modern Physics · doi:10.1103/revmodphys.84.1527 · Cited by 2,441
Pohl, R., Antognini, A., Nez, F., Amaro, F. D., Biraben, F., Cardoso, J. M. R., Covita, D. S., Dax, A., Dhawan, S., Fernandes, L. M. P., et al. (2010) · Nature · doi:10.1038/nature09250 · Cited by 1,374
Fine Structure of the Hydrogen Atom by a Microwave Method
Lamb, W. E., & Retherford, R. C. (1947) · Physical Review · doi:10.1103/physrev.72.241 · Cited by 1,304
The Electromagnetic Shift of Energy Levels
Bethe, H. A. (1947) · Physical Review · doi:10.1103/physrev.72.339 · Cited by 972
Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen
Antognini, A., Nez, F., Schuhmann, K., Amaro, F. D., Biraben, F., Cardoso, J. M. R., Covita, D. S., Dax, A., Dhawan, S., Diepold, M., et al. (2013) · Science · doi:10.1126/science.1230016 · Cited by 885
Polarization Effects in the Positron Theory
Uehling, E. A. (1935) · Physical Review · doi:10.1103/physrev.48.55 · Cited by 673
Improved Measurement of the Hydrogen1S–2STransition Frequency
Parthey, C. G., Matveev, A., Alnis, J., Bernhardt, B., Beyer, A., Holzwarth, R., Maistrou, A., Pohl, R., Predehl, K., Udem, T., et al. (2011) · Physical Review Letters · doi:10.1103/physrevlett.107.203001 · Cited by 423
The Rydberg constant and proton size from atomic hydrogen
Beyer, A., Maisenbacher, L., Matveev, A., Pohl, R., Khabarova, K., Grinin, A., Lamour, T., Yost, D. C., Hänsch, T. W., Kolachevsky, N., et al. (2017) · Science · doi:10.1126/science.aah6677 · Cited by 383
Muonic Hydrogen and the Proton Radius Puzzle
Pohl, R., Gilman, R., Miller, G. A., & Pachucki, K. (2013) · Annual Review of Nuclear and Particle Science · doi:10.1146/annurev-nucl-102212-170627 · Cited by 354
Cited by
CODATA Recommended Values of the Fundamental Physical Constants: 2018
Tiesinga, E., Mohr, P. J., Newell, D. B., & Taylor, B. N. (2021) · Journal of Physical and Chemical Reference Data · doi:10.1063/5.0064853 · Cited by 299
Metadata
- Authors
- Bezginov, N., Valdez, T., Horbatsch, M., Marsman, A., Vutha, A. C., & Hessels, E. A.
- Venue
- Science
- Published
- 2019-09-06
- Volume
- 365
- Issue
- 6457
- Pages
- 1007-1012
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2971623082
- Cited by
- 339
- References
- 14
- FWCI
- 22.56
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: A measurement of the atomic hydrogen Lamb shift and the proton charge radius. https://app.cochat.ai/papers/10.1126/science.aau7807
- The paper
- Bezginov, N., Valdez, T., Horbatsch, M., Marsman, A., Vutha, A. C., & Hessels, E. A. (2019). A measurement of the atomic hydrogen Lamb shift and the proton charge radius. Science. https://doi.org/10.1126/science.aau7807
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
