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The proton radius puzzle
Conference paper

The proton radius puzzle

J.J. Krauth, K. Schuhmann, M. Abdou Ahmed, F.D. Amaro, P. Amaro, F. Biraben, J.M.R. Cardoso, M.L. Carvalho, D.S. Covita, A. Dax, …
Proceedings of the 52nd Rencontres de Moriond - 2017 Electroweak Interactions and Unified Theories, EW 2017, pp.95-102
2017

Abstract

Astronomy and Astrophysics Atomic and Molecular Physics and Optics
High-precision measurements of the proton radius from laser spectroscopy of muonic hydrogen demonstrated up to six standard deviations smaller values than obtained from electron-proton scattering and hydrogen spectroscopy. The status of this discrepancy, which is known as the "proton radius puzzle" will be discussed in this paper, complemented with the new insights obtained from spectroscopy of muonic deuterium.

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