EUROPEAN PHYSICAL JOURNAL C 80
, 439 (2020)
ISSN: 1434-6044, SCI
Investigation of the Higgs boson anomalous FCNC interactions in the simple 3-3-1 model
D. T. Huong, N. T. Duy
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 → μτ and also may reach perfect agreement with other experimental constraints such as τ → μγ and (g − 2)μ. The contributions of flavorchanging neutral current couplings, Higgs–quark–quark couplings, mixing to the mesons are investigated. Br(h → qq')can be enhanced acknowledging the measurements of meson
mixing. The branching ratio for t → qh can reach up to 10^−3, but it could be as low as 10^−8.