Abstract
The rare t-quark decays [Formula: see text], [Formula: see text] via the scalar leptoquark doublets are investigated in the minimal four-color symmetry model with the Higgs mechanism of the quark–lepton mass splitting. The partial widths of these decays are calculated and the total width of the charged lepton mode [Formula: see text] and the total width of the neutrino mode [Formula: see text] are found. The corresponding branching ratios are shown to be [Formula: see text] for the scalar leptoquark masses mS = 180–250 GeV and for the appropriate values (sin β≈ 0.2) of the mixing angle of the model. The search for such decays at LHC may be of interest.
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