Speaker: Gordan Krnjaic
The longstanding 3.7 sigma muon g-2 anomaly is perhaps the largest discrepancy in fundamental physics. On April 7th, the g-2 experiment at Fermilab will announce updated results that are expected to double the previous Brookhaven data set with comparable experimental errors; if the same central value is observed, the statistical significance could exceed 5 sigma and the discrepancy would become the first laboratory discovery of physics beyond the standard sodel (BSM). In this talk, I will categorize the different theoretical possibilities for BSM physics that resolve the anomaly and present a road map for how to discover the new particles responsible (even in a worst case "nightmare" scenario). A decisive probe of the underlying new physics will involve a combination of rare meson decay searches, new muon beam fixed-target experiments, and possibly even a future muon collider.