Leptonic $Z$ decays in the littlest $Higgs$ model with T-parity

Details Leptonic $Z$ decays in the littlest $Higgs$ model with T-parity Leptonic $Z$ decays in the littlest $Higgs$ model with T-parity

2008-11-05

arxiv.org/abs/0811.0708v2

Phys.Rev.D78:095006,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 8 figures, minor corrections; final version published in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.78.095006

The littlest $Higgs$ model with T-parity (called the $LHT$ model) predicts the existence of the T-odd leptons, which can generate contributions to some leptonic processes at the one-loop level. We calculate their contributions to the leptonic $Z$ decay processes $Z\to l\bar{l'}$, $Z\to l\bar{l}$, and $Z\rightarro \nu\bar{\nu}$. We find that the T-odd leptons can give significant contributions to the branching ratios of these decay processes in most of the parameter space. The experimental measurement values might generate constraints on the free parameters of the $LHT$ model.

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