Konwersatorium im. Leopolda Infelda

The muon anomalous magnetic moment (g-2) is a fascinating precision observable which is sensitive to all interactions of the Standard Model. Electromagnetic, strong, and weak interactions, the masses of the heaviest particles such as top-quark and Higgs boson as well as non-perturbative low-energy hadron dynamics all enter the Standard Model prediction in a relevant way. Currently, this prediction deviates by more than 3sigma from the experimental determination. The deviation is a tantalizing hint for physics beyond the Standard Model.
In the colloquium the Standard Model prediction is reviewed and future experimental progress is indicated. We then focus on the possible contributions from physics beyond the Standard Model, particularly from supersymmetry. We show that, despite negative LHC search results, the deviation in g-2 could still well be due to effects from new physics, and at the same time g-2 places strong constraints on new physics