Anomalous couplings of the third generation in rareBdecays

We study the potential effects of anomalous couplings of the third generation quarks to gauge bosons in rare $B$ decays. We focus on the constraints from flavor changing neutral current processes such as $\overrightarrow{b}s\gamma$ and $\overrightarrow{b}{\mathrm{sl}}^{+}{l}^{-}.$ We consider both dimension-four and dimension-five operators and show that the latter can give large deviations from the standard model in the still unobserved dilepton modes, even after the bounds from $\overrightarrow{b}s\gamma$ and precision electroweak observables are taken into account.