Long-Awaited Muon Measurement Boosts Evidence for New Physics Initial data from the Muon g-2 experiment have excited particle physicists searching for undiscovered subatomic particles and forces Print The muon g-2 magnetic storage ring, seen here at Brookhaven National Laboratory in New York before its 2013 relocation to Fermi National Accelerator Laboratory in Illinois. Credit: Alamy Advertisement When hundreds of physicists gathered on a Zoom call in late February to discuss their experiment’s results, none of them knew what they had found. Like doctors in a clinical trial, the researchers at the Muon g-2 experiment blinded their data, concealing a single variable that prevented them from being biased about or knowing—for years—what the information they were working with actually meant.