2020-10-30 11:00  P7F

Probing Charged Lepton Flavor Violation in the General Two-Higgs Doublet Model

Girish Kumar

The rates of charged lepton flavor violating (cLFV) processes in the Standard Model (SM) are highly suppressed–practically zero–due to tiny neutrino masses. Therefore, the observation of cLFV phenomena would be a clear sign of physics beyond the SM. In this talk, we will discuss cLFV processes in the framework of the general two-Higgs doublet model (g2HDM) without Z2 symmetry. The g2HDM naturally contains flavor violating Higgs Yukawa couplings, which can induce cLFV transitions. We will cover τ decays : τ → µγ, τ → 3µ, muon decays: µ → eγ, µ → 3e, and µ → e conversion in nuclei, and reassess the possibility of their potential discovery at the upcoming various experiments. In particular, we will emphasize the importance of two-loop contributions, which have been generally subdued in the past, and show that these contributions can drive up the cLFV rates to the vicinity of experimental sensitivity. In closing, we will also talk about lepton flavor violation in B-decays, which has attracted a lot of attention recently due to the emerging “flavor anomalies” at experiments, and briefly discuss implications for the model.