Signals of extra gauge bosons and exotic leptons in SU(6)$_{L}\otimes$U(1)$_{Y}$

Physics – High Energy Physics – High Energy Physics - Phenomenology

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Scientific paper

10.1103/PhysRevD.51.6474

We study some of the consequences of the SU(6)$_{L}\otimes$U(1)$_{Y}$ model of unification of electroweak interactions and families with a horizontal gauge group SU(2)$_{H}$, paying special attention to processes with flavor changing neutral currents. We compute at tree level the decays $K^{+}\longrightarrow \pi^{+}\mu^{+}e^{-}$, $K_L^0\longrightarrow \mu^{+}e^{-}$ and $\mu^{-} \longrightarrow e^{-} \bar{\nu_e} \nu_\mu$ from which we obtain lower bounds for the mass of the horizontal gauge boson associated with FCNC. Finally we obtain limits on the mixing between ordinary and exotic charged leptons.

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