Measurement of the Muon Magnetic Anomaly $$\boldsymbol{a}_{\boldsymbol{\mu}}$$ in the Muon $$\boldsymbol{g-2}$$ Experiment at Fermilab

The Fermilab Muon g-2 experiment measures the muon anomalous magnetic moment with high precision. Together with recent improvements on the theory front, the first results of the experiment confirm the long-standing discrepancy between the experimental measurements and the Standard Model predictions. The observed value of $$a_{\mu}({\textrm{FNAL}})=116\,592\,040(54)\times 10^{-11}(\text{0.46 ppm})$$ , combined with the previous experimental measurement, results in a discrepancy of $$(251\pm 59)\times 10^{-11}$$ with the theoretical prediction, corresponding to $$4.2\sigma$$ . This note presents the first results, the current status and the future prospects of the Muon $$g-2$$ experiment at Fermilab.