Muon g-2 and other observables in models with extended Higgs and matter sectors

TL;DR

This paper reviews models with extended Higgs and matter sectors as explanations for the muon g-2 anomaly, highlighting their testable predictions at colliders and potential signals like di-Higgs and tri-Higgs production.

Contribution

It introduces specific extended Higgs and vectorlike lepton models that address the muon g-2 anomaly and discusses their collider signatures and phenomenological predictions.

Findings

Modified muon Yukawa and gauge couplings predicted

Potential di-Higgs and tri-Higgs signals at muon colliders

Testable predictions at LHC and future colliders

Abstract

I review possible explanations of the muon g-2 anomaly in models with extended Higgs and matter sectors, focusing on extensions of the standard model and the two Higgs doublet model with vectorlike leptons. Predictions of these models, namely the modifications of muon Yukawa and gauge couplings, that can be searched for at the LHC and future colliders, are summarized. I also discuss striking predictions for di-Higgs and tri-Higgs signals at a muon collider that can be tested even at very low energies. Furthermore, I briefly comment on other interesting features and signatures of models with extended Higgs sector and vectorlike matter.