Search for t->ch at e+e- Linear Colliders

Details Search for t->ch at e+e- Linear Colliders Search for t->ch at e+e- Linear Colliders

2001-06-25

arxiv.org/abs/hep-ph/0106277v1

Phys.Lett. B516 (2001) 337-344

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 figures, 2 tables

Scientific paper

10.1016/S0370-2693(01)00949-2

We study the rare top-quark decay t->ch, where h is a generic Higgs boson, at a linear collider. If kinematically accessible, all models contain this decay at some level due to quark flavor mixing. Some models, such as Model III of the two-Higgs doublet model, have a tree-level top-charm-Higgs coupling, and the branching ratio is close to 0.5%. Others, such as the MSSM, have a coupling induced at one-loop, and can have a branching ratio in the range of 10^{-5} - 5x10^{-4}. We find that a linear collider of root(s) = 500 GeV and a luminosity of 500 fb^{-1} will begin to be sensitive to this range of the coupling.

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