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

D. T. Huong; N. T. Duy

doi:10.1140/epjc/s10052-020-7937-3

EPJ

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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2020) 80: 439
https://doi.org/10.1140/epjc/s10052-020-7937-3

Regular Article - Theoretical Physics

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

D. T. Huong¹^* and N. T. Duy¹^,2

¹ Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
² Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam

^* e-mail: dthuong@iop.vast.ac.vn

Received: 15 February 2020
Accepted: 15 April 2020
Published online: 18 May 2020

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 $h \rightarrow \mu \tau$ and also may reach perfect agreement with other experimental constraints such as $\tau \rightarrow \mu \gamma$ and $(g-2)_\mu$ . The contributions of flavor-changing neutral current couplings, Higgs–quark–quark couplings, mixing to the mesons are investigated. Br $(h \rightarrow q q^\prime )$ can be enhanced acknowledging the measurements of meson mixing. The branching ratio for $t \rightarrow q h$ can reach up to $10^{-3}$ , but it could be as low as $10^{-8}$ .