Muon g-2

Fermilab has refined measurements of the muon’s anomalous magnetic moment by focusing on where these calculations begin at the detector. The team achieved results more consistent with existing theoretical predictions without confirming new physics.

The experiment, designed to measure the magnetic moment of the muon, is also sensitive to a particle property called the electric dipole moment.

For 25 years, physicists have been puzzled by the way muons wobble in a magnetic field. Recent collider experiments showing discrepancies to other experiments could be a hint of unknown particles.

On April 18, the winners of some of the most lucrative prizes in science, were announced at the Breakthrough Prize ceremony. The Muon g-2 collaboration won the award in Fundamental Physics for the most precise measurement of the muon to date.

IFL Science talks with Chris Polly about the Muon g-2 collaboration’s precise measurement of the g-2 value honored with $3 million from the Breakthrough Prize in Fundamental Physics.

The Muon g-2 experiment at Fermilab received the prestigious Breakthrough Prize in fundamental physics for its precision measurement of the muon.

Science magazine highlights their top picks of significant science stories in 2025. Fermilab’s Muon g-2 announcement his year is included in this prestigious listing.

Gray Putnam, James Mott, Lauren Yates and Chris Jensen are this year’s recipients of the URA Honorary Awards. The awards are presented each year to recognize significant contributions to research at Fermilab.

Throughout this year, Fermilab’s dedicated scientists, engineers, technicians and operations staff came together to drive discoveries, advance American innovation and prepare the lab for a bright future.

Fermilab’s Muon g-2 collaboration has given its final word on the magnetic moment of the muon. Though the experimental measurement will likely now remain stable for several years, theorists expect to make rapid progress to reduce uncertainties and resolve tensions underlying the SM value.