EUROPEAN PHYSICAL JOURNAL C 80, 439 (2020)

ISSN: 1434-6044, SCIE

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.

URL: https://doi.org/10.1140/epjc/s10052-020-7937-3

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