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

We study the potential effects of anomalous couplings of the third generati on quarks to gauge bosons in rare B decays. We focus on the constraints fro m flavor changing neutral current processes such as b-->s gamma and b -->sl (+)l(-). We consider both dimension-four and dimension-five operators and s how that the latter can give large deviations from the standard model in th e still unobserved dilepton modes, even after the bounds from b-->s gamma a nd precision electroweak observables are taken into account.