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Flavor Changing Leptonic Decays of Heavy Higgs Bosons

CMS has reported indications (2.4σ) of the decay of the Higgs boson into μτ. The simplest explanation for such a decay would be a general Two Higgs Doublet Model (2HDM). In this case, one would expect the heavy neutral Higgs bosons, H and A, to also decay in a similar manner. We study two specific models. The first is the type III 2HDM, and the second is a 2HDM, originally proposed by Branco et al., in which all flavor-changing neutral processes are given by the weak mixing matrix. In the latter model, since mixing between the second and third generations in the lepton sector is large, flavor-changing interactions are large. In this model it is found that the decays of H and A to μτcan be as high as 60 percent. This work has nothing to do with the 750 GeV diphoton resonance.