In RS models of warped extra dimensions with SM fields in the bulk, two
scalar excitations are expected to be the lightest new particles
discovered at the LHC: the Higgs scalar and the radion graviscalar. Both
couple in similar fashion with matter and could actually mix. The fact
that fermions propagate in the bulk will induce tree level flavor
changing couplings between fermions and both scalars, therefore setting
bounds on the model parameters and inducing interesting phenomenological
predictions to be tested at the LHC.