Anomalous couplings-of the third generation in rare B decays -: art. no. 114016

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 b-->s gamma and b -->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 b-->s gamma and precision electroweak observables are taken into account.