Small violations of unitarity, the phase in Bs mixing and visible t->cZ decays at the LHC

Francisco J. Botella, Gustavo C. Branco, Miguel Nebot

We show that it is possible to accommodate the observed size of the phase in $B_s^0$--${\bar{B}}_s^0$, mixing in the framework of a model with violation of $3\times 3$ unitarity. This…