https://doi.org/10.1051/epjconf/201713701023
Review of experimental and theoretical status of the proton radius puzzle
1 Perimeter Institute for Theoretical Physics, Waterloo, ON, N2L 2Y5 Canada
2 Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
3 TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3 Canada
a e-mail: richardhill@perimeterinstitute.ca
Published online: 22 March 2017
The discrepancy between the measured Lamb shift in muonic hydrogen and expectations from electron-proton scattering and regular hydrogen spectroscopy has become known as the proton radius puzzle, whose most “mundane” resolution requires a > 5σ shift in the value of the fundamental Rydberg constant. I briefly review the status of spectroscopic and scattering measurements, recent theoretical developments, and implications for fundamental physics.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
