Proton Radius Puzzle and the PRad Experiment at JLab
The proton radius revisited | Science
The Rydberg constant and proton size from atomic hydrogen | Science
The proton radius puzzle - ScienceDirect
Frontiers | Reinterpretation of Classic Proton Charge Form Factor Measurements
Francis Villatoro on Twitter: "The proton radius puzzle in 2010: ~8σ discrepancy between muon and electron based measurements https://t.co/JEH2CpSIJg" / Twitter
New measurement yields smaller proton radius | EurekAlert!