FCNC Top Quark Decays in Extra Dimensions

Details FCNC Top Quark Decays in Extra Dimensions FCNC Top Quark Decays in Extra Dimensions

2006-05-30

arxiv.org/abs/hep-ph/0605335v4

Physics

High Energy Physics

High Energy Physics - Phenomenology

Accepted to be published in the Europ. Phys. Jour. C; 16 pages, 2 figures

Scientific paper

10.1140/epjc/s10052-007-0344-1

The flavor changing neutral top quark decay t -> c X is computed, where X is a neutral standard model particle, in a extended model with a single extra dimension. The cases for the photon, X= \gamma$, and a Standard Model Higgs boson, X = H, are analyzed in detail in a non-linear$R_\xi gauge. We find that the branching ratios can be enhanced by the dynamics originated in the extra dimension. In the limit where 1/R >> ->, we have found Br(t -> c \gamma) \simeq 10^{-10} for 1/R = 0.5 TeV. For the decay t -> c H, we have found Br(t -> cH) \simeq 10^{-10} for a low Higgs mass value. The branching ratios go to zero when 1/R -> \infty.

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