Measuring the Anomalous Magnetic Moment of the Muon
Abstract
The anomalous magnetic moment of the muon, characterized as the anomaly aμ≡ (gμ-2)/2, remains a compelling hint of physics beyond the Standard Model (BSM) in light of the Brookhaven E821 measurement from the early 2000s, which differs with theoretical predictions at the 3.7σ level. To address this discrepancy, the Muon g-2 Experiment at Fermilab (E989) has been designed to determine aμ to a precision of 140 parts per billion, a four-fold improvement over the E821 measurement. This improved precision presents an excellent opportunity to uncover BSM physics, and at minimum constrain BSM models. In its first physics run in 2017-2018, the E989 experiment recorded nearly a factor of 2 more statistics (before data quality cuts) than was recorded at BNL, and is currently taking its second run of physics-quality data. An overview of the experimental technique will be discussed, along with an update of the analysis of the Run-1 data and current run progress. Additionally, we will review worldwide aμ efforts in presenting an update on recent theoretical progress, the new experiment being built at KEK, and related muon physics in the muonium hyperfine splitting experiment MuSEUM.
- Publication:
-
APS April Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..APRY03002F