Speaker
Description
We investigated the muon g-2 in the two-Higgs doublet model (2HDM), employing the recent full two-loop computation and making comprehensive use of experimental constraints from Higgs and flavour physics. In the talk we present the result of detailed analysis in the flavour-aligned 2HDM and
characterize the parameter regions possible to explain the current $3\sigma$ deviation. Particularly we present the absolute maximum of the muon g-2 in the 2HDM as a function of the lightest Higgs mass.
We focus on the light CP odd neutral Higgs Boson $A$, and show that large lepton Yukawa couplings can enhance the muon g-2 in this mass region. We present in detail the maximum possible Yukawa couplings to leptons and quarks of a light $A$ allowed by the LHC and B-Physics results. As a result we find that an overall maximum of $45 × 10^{−10}$ for the muon g-2 and large top and tau Yukawa couplings are possible in the parameter region $20 < M_A < 100$ GeV in the 2HDM.
