Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-11-11
Mod.Phys.Lett. A20 (2005) 3003-3012
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 1 figure, 1 table, to be published in Modern Physics Letters A
Scientific paper
10.1142/S0217732305019109
Fermionic decays of the scalar leptoquarks $ S=S_1^{(+)}, S_1^{(-)}, S_m $ and of the scalar gluons $F=F_1, F_2$ predicted by the four color symmetry model with the Higgs mechanism of the quark-lepton mass splitting are investigated. Widths and branching ratios of these decays are calculated and analysed in dependence on coupling constants and on masses of the decaying particles. It is shown that the decays $ S_1^{(+)}\to tl^+_j, S_1^{(-)}\to \nu_i\tilde b, S_m\to t\tilde \nu_j, F_1\to t\tilde b, F_2\to t\tilde t $ are dominant with the widths of order of a few GeV for $m_S, m_F<1$ TeV and with the total branching ratios close to 1. In the case of $m_S < m_t$ the dominant scalar leptoquark decays are $ S_1^{(+)}\to cl_j^+, S_1^{(-)}\to \nu_i\tilde b, S_m\to b\l_j^+, S_m\to c\tilde \nu_j $ with the total branching ratios $Br(S_1^{(+)}\to cl^+) \approx $ $Br(S_1^{(-)}\to \nu\tilde b) \approx 1$, $Br(S_m\to bl^+) \approx 0.9$ and $Br(S_m\to c\tilde \nu) \approx 0.1.$ A search for such decays at the LHC and Tevatron may be of interest.
Popov Yu P.
Povarov A. V.
Smirnov Dmitry A.
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