$(g-2)_\mu$ in the 2HDM and slightly beyond -- an updated view

Understand

The recent measurement of the muon $g - 2$ anomaly continues to defy a Standard Model explanation, but can be accommodated within the framework of two Higgs doublet models.

• If one further includes extra fermion content in the form of a generation of vector like leptons, the allowed parameter range that explains the anomaly is even further extended, and thorny issues of perturbativity and clashes with $B$-decay constraints avoided.
• We will show how the muon magnetic moment anomaly can be fit within these models, under the assumption that the vector-like leptons do not mix with the muon.
• We update previous analyses and include all theoretical and experimental constraints, including searches for extra scalars.