Top-quark decay into Upsilon-meson
Abstract
The calculation of the partial width of the rare t-quark decay into Upsilon-meson, W-boson and b-quark (t -> W b) is presented. The branching ratio equals Br(t -> Upsilon W b) = 1.3 * 10-5 that make possible searches for this rare t-quark decay at LHC.
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