Tuesday, November 12, 2019
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Physicists Finally Nail the Proton’s Size, and Hope Dies | Quanta...

A proton is made of a swarm of quarks and gluons, as imagined in this illustration.In 2010, physicists in Germany reported that they had made an exceptionally precise measurement of the size of the proton, the positively charged building block of atomic nuclei. The result was very puzzling. Randolf Pohl of the Max Planck Institute of Quantum…