The Muon g-2 experiment at Fermilab measured the muon's magnetic moment with a precision better than 0.5 parts per million, with results made public in early April 2021.
Notes on verification
Confirmed by Fermilab's official result publication and press release, plus independent physics press coverage (Symmetry Magazine). Precision figures and date align precisely with primary source data. [tier=silver indep_score=0.925 clusters=2 claim_tier=notable | framework convergence=single on Muon g-2 experiment official results (Fermilab Run-1 dataset combined with Brookhaven E821 measurement) (upstreams: Fermilab Muon g-2 Collaboration) — publishers independent, evidence may not be | kind=empirical eligibility=high]
Sources
- Vers un nouveau continent de la physique ? | CNRS Le journal (seed:science_and_space)
- https://muon-g-2.fnal.gov/result2021.pdf (corroboration)
- https://news.fnal.gov/2021/04/first-results-from-fermilabs-muon-g-2-experiment-strengthen-evidence-of-new-physics/ (corroboration)
- https://www.symmetrymagazine.org/article/fermilabs-muon-g-2-experiment-shakes-up-particle-physics (corroboration)