Speaker
Description
The anomalous magnetic moment of the muon, also called the muon $g-2$, is a sensitive probe of the Standard Model. Any evidence for a non-zero deficit between experimental measurement and theoretical prediction would be ascribed to contributions from physics beyond the SM. While the latest experimental average displays a tension of 5.1$\sigma$ with the SM estimate as published in a White Paper in 2020, a straightforward interpretation of this result is precluded by a significant tension between lattice QCD calculations of the hadronic vacuum polarisation contribution and the corresponding estimates based on the traditional "data-driven" method employing experimental hadronic cross section data. In this contribution, I review the current status of different evaluations of the hadronic contributions to the muon $g-2$ and discuss their implications for the running of the electromagnetic coupling and the consistency of global fits using electroweak precision data.
