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Particle and nuclear

Particle and nuclear

Has the proton radius puzzle been solved at last?

28 Nov 2020
MPQ 1S-3S experiment
Puzzling protons: Alexey Grinin and Dery Taray working on the vacuum system of the 1S-3S experiment at the Max Planck Institute for Quantum Optics. (Courtesy: MPQ)
A new and extremely precise measurement of the radius of the proton using hydrogen spectroscopy has

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Edwin Cartlidge is a science writer based in Rome
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