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

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.

Probing anomalous tqh couplings via single top production in associated with the Higgs boson at the HE-LHC and FCC-hh

“…The flavor-violating Higgs couplings involving a top quark in the SM, i.e., the vertex tqh (q = u, c), a e-mail: yanjuzhang@xxmu.edu.cn b e-mail: shjf@xxmu.edu.cn (corresponding author) are out of range for current LHC experimental sensitivities. While in some NP scenarios such as supersymmetry [5][6][7], two-Higgs-doublet model [8][9][10][11][12], 3-3-1 model [13], and other NP models by extending the Higgs sector [14,15], the branching ratios of top quark FCNC decays t → qh are predicted promisingly at the order of 10 −6 − 10 −3 . Thus searches for such FCNC processes are very important and could be considered as a clear signal for NP beyond the SM [16][17][18].…”

Anomalous Magnetic Dipole Moment \((g-2)\mu\) in 3-3-1 Model with Inverse Seesaw Neutrinos

“…The well-known 3-3-1 model with right handed neutrinos (331RN) was introduced [1] not long after the appearance of the minimal 3-3-1 version [2]. Phenomenology of the 3-3-1 models is very interesting because it can explain the recent experimental data of neutrino oscillation [3], including the study of the AMM [4][5][6][7][8][9][10][11][12]. Theoretical and experimental aspects of the AMM were reviewed in detailed in Refs.…”

“…[3,9]. It was concerned recently [10,12] that many 3-3-1models can not explain the recent experimental data of a µ under the constraint of the symmetry breaking SU(3) L scale obtained by searching for the neutral heavy gauge boson Z at LHC. Hence these 3-3-1 models should be extended.…”