A warped extra-dimensional model, where the standard model Yukawa hierarchy is set by UV physics, is shown to have a sweet spot of parameters with improved experimental visibility and possibly naturalness. Upon marginalizing over all the model parameters, a Kaluza-Klein scale of 2.1 TeV can be obtained at $2\sigma$ (95.4% C.L.) without conflicting with electroweak precision measurements. Fitting all relevant parameters simultaneously can relax this bound to 1.7 TeV. In this bulk version of the Rattazzi-Zaffaroni shining model, flavor violation is also highly suppressed, yielding a bound of 2.4 TeV. Nontrivial flavor physics at the LHC in the form of flavor gauge bosons is predicted. The model is also characterized by a depletion of the third-generation couplings—as predicted by the general minimal flavor violation framework—which can be tested via flavor precision measurements. In particular, sizable $CP$ violation in $\Delta B=2$ transitions can be obtained, and there is a natural region where $B_s$ mixing is predicted to be larger than $B_d$ mixing, as favored by recent Tevatron data. Unlike other proposals, the new contributions are not linked to Higgs or any scalar exchange processes.

• Received 14 March 2011

DOI:https://doi.org/10.1103/PhysRevD.83.115003