The Muon g-2 Experiment at Fermilab

TL;DR

The Fermilab Muon g-2 experiment precisely measured the muon magnetic anomaly, confirming previous results and increasing the discrepancy with the Standard Model prediction, thus providing potential evidence for new physics.

Contribution

This paper presents the methodology and recent results of the Fermilab Muon g-2 experiment, highlighting improvements over prior measurements and confirming the anomaly's persistence.

Findings

Measured $a_{}$ with unprecedented precision

Confirmed previous Brookhaven results

Strengthened the tension with Standard Model predictions

Abstract

The muon magnetic anomaly, $a_{\mu}$, is a powerful test of the Standard Model of particle physics. A new experiment at Fermilab has recently measured $a_{\mu}$ with unprecedented precision, confirming the results of the earlier Brookhaven experiment and strengthening the tension with the prediction of the Standard Model as determined by dispersive methods. We here describe the experimental technique, recapitulate the recent result, and discuss some of the improvements made for subsequent analyses.