Muonic hydrogen and the proton radius puzzle
Atomic Physics
2013-06-03 v2 High Energy Physics - Phenomenology
Nuclear Experiment
Nuclear Theory
Abstract
The extremely precise extraction of the proton radius by Pohl et al. from the measured energy difference between the 2P and 2S states of muonic hydrogen disagrees significantly with that extracted from electronic hydrogen or elastic electron-proton scattering. This is the proton radius puzzle. The origins of the puzzle and the reasons for believing it to be very significant are explained. Various possible solutions of the puzzle are identified, and future work needed to resolve the puzzle is discussed.
Keywords
Cite
@article{arxiv.1301.0905,
title = {Muonic hydrogen and the proton radius puzzle},
author = {Randolf Pohl and Ronald Gilman and Gerald A. Miller and Krzysztof Pachucki},
journal= {arXiv preprint arXiv:1301.0905},
year = {2013}
}
Comments
Minor modifications, some references added, to appear in Annu. Rev. Nucl. Part. Sci. Vol 63 (2013). 60 pages, 5 figures, 1 table