Phenomenological aspects of the exotic $T$ quark in 331 models
  In the context of 331 models we analyze the phenomenology of exotic $T$ quarks with electric charge 2/3. We establish bounds for the corresponding masses and mixing angles and study the decay modes $T\to bW$, $tZ$ and $qH$. It is found that the decays into scalars are strongly dependent on the model parameters, and can be the dominant ones in a scenario with approximate flavor symmetry. 
J.M. Cabarcas, D. Gomez Dumm, R. Martinez