Studying top quark decay into the polarized W-boson in the TC2 model

Details Studying top quark decay into the polarized W-boson in the TC2 model Studying top quark decay into the polarized W-boson in the TC2 model

2005-01-16

arxiv.org/abs/hep-ph/0501145v1

Phys.Rev.D71:014035,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 4 figures

Scientific paper

10.1103/PhysRevD.71.014035

We study the decay mode of top quark decaying into Wb in the TC2 model where the top quark is distinguished from other fermions by participating in a strong interaction. We find that the TC2 correction to the decay width $\Gamma (t \to b W) $ is generally several percent and maximum value can reach 8% for the currently allowed parameters. The magnitude of such correction is comparable with QCD correction and larger than that of minimal supersymmetric model. Such correction might be observable in the future colliders. We also study the TC2 correction to the branching ratio of top quark decay into the polarized W bosons and find the correction is below $ 1 % $. After considering the TC2 correction, we find that our theoretical predictions about the decay branching ratio are also consistent with the experimental data.

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