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Physicists Just Learned Something Major About the Proton

Hall A at Thomas Jefferson National Accelerator Facility.
Hall A at Thomas Jefferson National Accelerator Facility. Photo: Wikimedia Commons

Physics at the smallest scales is a challenge of observation: Particles are often fleeting, and the forces that govern their behavior are nearly imperceptible. But now, by exploiting decades-old data and a 50-year-old prediction about gravity’s import on subatomic particles, a team of physicists has teased out a measurement for a second mechanical property in the proton. – Isaac Schultz Read More

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