Speaker
Description
The Muon g-2 endures as one of the most stringent tests of the Standard Model (SM). The recent combined result from Run 2 and Run 3 of the Muon g-2 Experiment at Fermilab confirms both the Run-1 Fermilab and Brookhaven measurements of the Muon g-2 with an overall unprecedented precision of 190 parts-per-billion, and it has already surpassed the overall target for its systematic uncertainty. The status of the SM prediction, also at sub-percent precision, rests on the determination of the hadronic vacuum polarisation (HVP) contributions. Tensions exist between data-driven dispersive evaluations and lattice QCD of the HVP, with the former favouring a signal of new physics at 5 sigma when comparing the SM prediction to the Muon g-2 Experiment, and the latter being in closer agreement with the experimental measurement. I will review both the status of the Muon g-2 Experiment (including projections for the release of its final result from its entire data set) and of the theoretical SM predictions, highlighting the efforts by the Muon g-2 Theory Initiative to resolve and understand current discrepancies.
