Tau Leptonic Decay τ→ lνlντ in Littlest Higgs Model

We consider the τ leptonic decay τ→ lνlντ in the framework of the littlest Higgs (LH) model and calculate the corrections of new particles to this decay. We find that the contributions of the charged scalars can be safely ignored and the LH model is in perfect agreement with the universality of the couplings of the SU gauge bosons to the leptonic charged currents. The corrections of the LH model to the τ leptonic decay τ→ lνlντ axe not sensitive to the parameter c, but depend strongly on the parameters f and x. The precision measured data about the τ leptonic decay demand that the parameter f approximately equal 3.5 TeV and x ＞ 0.1, while agree with the general expectation based on other phenomenological explorations.

作 者： YUE Chong-Xing WANG Wei   作者单位： Department of Physics, Liaoning Normal University, Dalian 116029, China  刊 名： 理论物理通讯（英文版）  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2004 42(8)  分类号： O57  关键词： tau leptonic decay   littlest Higgs model   corrections  

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