The New (2023) Result from the Muon g-2 Experiment

The Muon g-2 Experiment at Fermilab just released an updated measurement of the anomalous magnetic moment of the muon. This is an update of their 2021 result which showed a deviation from the Standard Model prediction of 4.2 sigma.

There are many types of new physics that could first show up as a deviation in the measured value of muon g-2 from its value predicted in the Standard Model. So, this result has implications for models of dark matter, supersymmetry, Higgs physics, and others. For this reason, this updated result has been much anticipated.

For lots of background information on muon g-2, check out the Miniseries on g-2 of the Muon:
   • Introducing the Miniseries on g-2 of ...  

Also, What's a Blind Analysis?:
   • What's a Blind Analysis?  


Muon g-2 Experiment website:
https://muon-g-2.fnal.gov/

Fermilab's 2021 result:

2021 Papers:
Muon g-2 Collaboration, Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm (2021)
B. Abi et al. Phys. Rev. Lett. 126, 141801
https://journals.aps.org/prl/abstract...

Muon g-2 Collaboration, Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g-2 Experiment (2021)
T. Albahri et al. Phys. Rev. D 103, 072002
https://journals.aps.org/prd/abstract...

2021 Announcement seminar:
   • Scientific Seminar: First results fro...  


New result:
https://muon-g-2.fnal.gov/result2023.pdf

New Announcement Seminar:
   • Scientific Seminar: 2023 results from...  

SM prediction from Muon g-2 Theory Initiative:
https://muon-gm2-theory.illinois.edu/
Aoyama, T., et al, The anomalous magnetic moment of the muon in the Standard Model (2020), Physics Reports 887, 3 December 2020, Pages 1-166.
https://www.sciencedirect.com/science...