Lepton flavor changing Higgs Boson decays in a Two Higgs Doublet Model with a fourth generation of fermions

摘要

We analyze the flavor changing decay $h\rightarrow \mu \tau $ in theframework of a Two Higgs Doublet Model with a fourth generation of fermions(4G2HDM). We obtain that the respective branching ratio at one-loop level canreach values as high as $ 10^{-6} $ for a mass of $ 100-350 $ GeV of the heavylepton in the fourth family and a heavy neutral Higgs boson with mass in therange $ 200-700 $ GeV. These radiative corrections are of the same order ofmagnitude as the tree level prediction of the 4G2HDM.