Rare t-quark decays $t \to c l_j^{+} l_k^{-}$, $t \to c \tilde{ν_j} ν_k$ in the minimal four color symmetry model

P. Yu. Popov; A. D. Smirnov

doi:10.1142/S0217732305016907

paper

Rare t-quark decays $t \to c l_{j}^{+} l_{k}^{-}$ , $t \to c ν_{j} ~ ν_{k}$ in the minimal four color symmetry model

arXiv:hep-ph/0502191 · doi:10.1142/S0217732305016907

Abstract

The rare t-quark decays $t \to c l_{j}^{+} l_{k}^{-}$ , $t \to c ν_{j} ~ ν_{k}$ 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 $Γ (t \to c l^{+}^{'} l^{-}) = \sum_{j, k} Γ (t \to c l_{j}^{+} l_{k}^{-})$ and the total width of the neutrino mode $Γ (t \to c ν ~^{'} ν) = \sum_{j, k} Γ (t \to c ν_{j} ~ ν_{k})$ are found. The corresponding branching ratios are shown to be $B r (t \to c l^{+}^{'} l^{-}) \approx (3.5 - 0.4) 1 0^{- 5},$ $B r (t \to c ν ~^{'} ν) \approx (7.1 - 0.8) 1 0^{- 5}$ for the scalar leptoquark masses $m_{S} = 180 - 250 G e V$ and for the appropriate values $(sin β \approx 0.2)$ of the mixing angle of the model. The search for such decays at LHC may be of interest.

18 pages, 2 figures, 1 table, to be published in Modern Physics Letters A; corrected typos

References in corpus (1)

Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Rare t-quark decays t→clj+​lk−​, t→cνj​~​νk​ in the minimal four color symmetry model

Abstract

References in corpus (1)

Cited by in corpus (9)

Rare t-quark decays $t \to c l_{j}^{+} l_{k}^{-}$ , $t \to c ν_{j} ~ ν_{k}$ in the minimal four color symmetry model