New physics explanations of $a_\mu$ in light of the FNAL muon $g-2$ measurement

Understand

The Fermilab Muon $g-2$ experiment recently reported its first measurement of the anomalous magnetic moment $a_\mu^{\textrm{FNAL}}$, which is in full agreement with the previous BNL measurement and pushes the world average deviation $\Delta a_\mu^{2021}$ from the Standard Model to a significance of $4.2\sigma$.

• Here we provide an extensive survey of its impact on beyond the Standard Model physics.
• We use state-of-the-art calculations and a sophisticated set of tools to make predictions for $a_\mu$, dark matter and LHC searches in a wide range of simple models with up to three new fields, that represent some of the few ways that large $\Delta a_\mu$ can be explained.
• In addition for the particularly well motivated Minimal Supersymmetric Standard Model, we exhaustively cover the scenarios where large $\Delta a_\mu$ can be explained while simultaneously satisfying all relevant data from other experiments.