https://doi.org/10.1140/epjc/s10052-024-13507-w
Regular Article
Top quark decays in the flavor-dependent 
model
1
Department of Physics, Hebei University, 071002, Baoding, China
2
Radiation Monitoring Technical Center of Ministry of Ecology and Environment, State Environmental Protection Key Laboratory of Radiation Environmental Monitoring, Key Laboratory of Radiation Environmental Safety Monitoring of Zhejiang Province, 310012, Hangzhou, China
3
Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, 071002, Baoding, China
Received:
18
July
2024
Accepted:
15
October
2024
Published online:
20
November
2024
The branching ratios of the flavor changing top quark decays in the SM are too small to be detected experimentally. Therefore, any observable signal for these processes at the LHC would serve as compelling evidence for new physics. In the flavor-dependent model, a newly introduced Higgs singlet interacts directly with the quark sector and mixes with the SM-like Higgs, influencing the 
and 
process. Additionally, the flavor dependence of the charge affect the 
process. In this work, we investigate these process within the framework of the flavor-dependent model. Numerical results indicates that with suitable choices of new physics parameters, the branching ratios of these processes in the flavor-dependent model can be significantly enhanced. Specifically, the branching ratios of and can reach the order of 
in some chosen parameter spaces, which is close to the current experimental upper limit. This suggests that these processes have significant opportunities to be observed experimentally, and the parameter space of the model will face constraints from the experimental upper bounds.
© The Author(s) 2024
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