Top quark rare three-body decays in the littlest Higgs model with T-parity

Details Top quark rare three-body decays in the littlest Higgs model with T-parity Top quark rare three-body decays in the littlest Higgs model with T-parity

2011-02-22

arxiv.org/abs/1102.4402v2

Phys.Rev.D83:034032,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 10 figures

Scientific paper

10.1103/PhysRevD.83.034032

In the littlest Higgs model with T-parity (LHT), the mirror quarks have flavor structures and will contribute to the top quark flavor changing neutral current. In this work, we perform an extensive investigation of the top quark rare three-body decays $t\to cVV (V=\gamma,Z,g)$ and $t\to cf\bar{f} (f=b,\tau,\mu,e)$ at one-loop level. Our results show that the branching ratios of $t\to cgg$ and $t\to cb\bar{b}$ could reach $\mathcal {O}(10^{-3})$ in the favorite parameter space of the littlest Higgs model with T-parity, which implies that these decays may be detectable at the LHC or ILC, while for the other decays, their rates are too small to be observable at the present or future colliders.

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