Investigation of the Higgs boson anomalous FCNC interactions in the simple 3-3-1 model

Abstract

Abstract We study phenomenological constraints on the simple 3-3-1 model with flavor-violating Yukawa couplings. Both Higgs triplets couple to leptons and quarks, which generates flavor-violating signals in both lepton and quark sectors. We have shown that this model allows for a large Higgs lepton flavor-violating rate decay $$h \rightarrow \mu \tau $$ h→μτ and also may reach perfect agreement with other experimental constraints such as $$\tau \rightarrow \mu \gamma $$ τ→μγ and $$(g-2)_\mu $$ (g-2)μ . The contributions of flavor-changing neutral current couplings, Higgs–quark–quark couplings, mixing to the mesons are investigated. Br$$(h \rightarrow q q^\prime )$$ (h→qq′) can be enhanced acknowledging the measurements of meson mixing. The branching ratio for $$t \rightarrow q h$$ t→qh can reach up to $$10^{-3}$$ 10-3 , but it could be as low as $$10^{-8}$$ 10-8 .