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

New Measurement of the 1S−3S Transition Frequency of Hydrogen: Contribution to the Proton Charge Radius Puzzle

(2018) Hélène Fleurbaey et al.   PHYSICAL REVIEW LETTERS

Ultrahigh-Precision Measurement of the n=2 Triplet P Fine Structure of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields

(2018) K. Kato et al.   PHYSICAL REVIEW LETTERS

The Rydberg constant and proton size from atomic hydrogen

(2017) Axel Beyer et al.   SCIENCE

CODATA Recommended Values of the Fundamental Physical Constants: 2014

(2016) Peter J. Mohr et al.   JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA

Frequency-offset separated oscillatory fields

(2015) A. C. Vutha et al.   PHYSICAL REVIEW A

The Proton Radius Problem

(2014) Jan C. Bernauer et al.   SCIENTIFIC AMERICAN

Muonic Hydrogen and the Proton Radius Puzzle

(2013) Randolf Pohl et al.   Annual Review of Nuclear and Particle Science

Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen

(2013) A. Antognini et al.   SCIENCE

Improved Measurement of the Hydrogen1S–2STransition Frequency

(2011) Christian G. Parthey et al.   PHYSICAL REVIEW LETTERS

The size of the proton

(2010) Randolf Pohl et al.   NATURE