  b to s transitions are flavour-changing neutral current (FCNC) processes that
play an important role in the search for physics beyond the Standard Model
(SM). Contributions from virtual particles in the loop are predicted to deviate
observables, such as the branching fraction, from their SM expectations. Using
data from the BaBar experiment, we present the first search for the rare decay
B to K tau tau. The BABAR results on the measurement of the angular asymmetries
of B to Kstar l l, where l is an electron or muon, are also reported. In
addition, using a time-dependent analysis of B to KS0 pi pi gamma, the mixing
induced CP-asymmetry for the radiative FCNC decay, B to KS0 rho gamma, is
measured, along with an amplitude analysis of the m (K pi) and m (K pi pi)
spectrum.
