Muon g-2 doubles down with latest measurement, explores uncharted territory in search of new physics

• Physicists from Fermilab now have a brand-new measurement of a property of the muon called the anomalous magnetic moment that improves the precision of their previous result by a factor of 2.

An international collaboration of scientists working on the Muon g-2 experiment at the U.S. Department of Energy’s Fermi National Accelerator Laboratory announced the much-anticipated updated measurement on Aug. 10. This new value bolsters the first result they announced in April 2021 and sets up a showdown between theory and experiment over 20 years in the making. 

The measurement of g-2 corresponds to a precision of 0.21 parts per million. The Muon g-2 collaboration describes the result in a paper that they submitted today to Physical Review Letters.

Here is the recording of the scientific seminar held on Aug. 10, 2023.

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Image: Muon g-2 collaboration