"Proton's Strong Force Strength Revealed by Gravity"

Nuclear physicists at the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility have used gravity to reveal new details about the strong force inside the proton, providing a snapshot of the force's distribution and shear stress on the quark particles. This research, published in Reviews of Modern Physics, marks the second measurement of the proton's mechanical properties and was made possible by a half-century-old prediction and two-decade-old data from experiments conducted with Jefferson Lab's Continuous Electron Beam Accelerator Facility.