EditorialAn undated photo provided by Reidar Hahn for the U.S. Department of Energy shows Paolo Girotti, a scientist at Fermilab, which had the world’s most powerful particle collider until the Large Hadron Collider was built, as he adjusts instruments for the Muon g-2 experiment in 2017. (Reidar Hahn/U.S. Department of Energy via The New York Times)
EditorialThe Muon g-2 ring, at the Fermi National Accelerator Laboratory in Batavia, Ill., operates at minus 450 degrees Fahrenheit and studies the wobble of muons as they travel through the magnetic field. (Reidar Hahn/Fermilab/U.S. Department of Energy via The New York Times)