LNS Lunchtime Seminar

Tuesday, November 28, 2023 at 12:00pm to 1:00pm

Building 26, 414
60 VASSAR ST, Cambridge, MA 02139

David Tarazona 

New Results from the Muon g−2 Experiment at Fermilab

The Muon g−2 Experiment at Fermi National Accelerator Labora-tory recently announced the latest measurement of the muon’s anomalous magnetic moment, aμ, from data collected in 2019 and 2020. The result achieved a precision of 215 parts per billion (ppb) and is in excellent agree-ment with the initial measurement from data we collected in 2018. Com-bining these results with the previous measurements taken at Brookhaven National Laboratory, the experimental value reaches a statistical signif-icance of 5.1σ from the official Standard Model (SM) calculation of aμ provided by the g−2 Muon Theory Initiative. However, the tension can potentially change once the lattice calculations of the hadronic contribu-tion to the SM theory prediction for aμ are fully resolved. I will present an overview of the experiment, the developments that improved the latest experimental precision by more than a factor of two, and an outlook of the experiment’s future.

Event Type




Laboratory for Nuclear Science
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