Lepton flavor violation decays $τ^-\to μ^- P_1 P_2$ in the topcolor-assisted technicolor model and the littlest Higgs model with $T$ parity

Details Lepton flavor violation decays $τ^-\to μ^- P_1 P_2$ in the topcolor-assisted technicolor model and the littlest Higgs model with $T$ parity Lepton flavor violation decays $τ^-\to μ^- P_1 P_2$ in the topcolor-assisted technicolor model and the littlest Higgs model with $T$ parity

2009-10-14

arxiv.org/abs/0910.2514v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 7 figures

Scientific paper

The new particles predicted by the topcolor-assisted technicolor ($TC2$) model and the littlest Higgs model with T-parity (called $LHT$ model) can induce the lepton flavor violation ($LFV$) couplings at tree level or one loop level, which might generate large 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 $\tau^-\to\mu^- P_1 P_2 $ with $P_1 P_2$ = $\pi^+\pi^-$, $K^+K^-$ and $K^0\bar{K^0}$ in the context of these two kinds of new physics models. We find that the $TC2$ model and the $LHT$ model can indeed produce significant contributions to some of these $LFV$ decay processes.

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