Abstract
The new particles predicted by the littlest Higgs model with T-parity (called LHT model) can induce the lepton flavor violation (LFV) couplings at the one-loop level, which can add contributions to some LFV processes. Taking into account the constraints of the experimental data on the relevant free parameters, we calculate the branching ratios of the LFV decay processes Z → \( l\bar l' \) and τ − → µ− P 1 P 2 with P 1 P 2 = π + π −, K + K −, and K 0 \( \bar K^0 \) in the context of this new physics model. We find that the LHT model can indeed make significant contributions to some of these LFV decay processes. The Z factory option for the future high energy e + e − collider experiments will give severe constraints on the LHT model.
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Yue, C., Ma, W., Zhang, T. et al. The littlest Higgs model with T-parity and some lepton flavor violation decay processes. Sci. China Phys. Mech. Astron. 53, 1968–1974 (2010). https://doi.org/10.1007/s11433-010-4131-x
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DOI: https://doi.org/10.1007/s11433-010-4131-x