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Fermilab g-2 collaboration publishes final result

Accepted submission by PiMuNu at 2025-06-17 08:40:25
Science

Physics reports that Fermilab's g-2 collaboration has now published its final result.

https://physics.aps.org/articles/v18/116 [aps.org]

From TFA:
"After measuring the wobbles of 300 billion muons, the Muon g − 2 Collaboration has pinpointed with exquisite precision the internal magnetism of these subatomic particles. The muon’s magnetic strength, or moment, has animated particle physics research over the past two decades, as experiment and theory appeared to disagree over its value—raising a flag for possible new physics. In a somewhat surprising turn of events, the final results from the Muon g − 2 experiment line up with the most recent predictions, further validating the standard model of particle physics."

The discrepancy has apparently been resolved following improvements to the theoretical estimate for g-2. The Standard Model of Particle Physics - disappointingly for particle physicists - still stands as an entirely accurate prediction of almost all of subatomic physics (the exception being neutrino oscillations https://en.wikipedia.org/wiki/Neutrino_oscillation [wikipedia.org] ).

Preprint paper:
http://arxiv.org/abs/2506.03069 [arxiv.org]


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