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We have considered a general 5D warped model with SM fields propagating inthe bulk and computed explicit expressions for oblique and non-obliqueelectroweak observables as well as for flavor and CP violating effectivefour-fermion operators. We have compared the resulting lower bounds on theKaluza-Klein (KK) scale in the RS model and a recently proposed model with ametric modified towards the IR brane, which is consistent with obliqueparameters without the need for a custodial symmetry. We have randomlygenerated 40,000 sets of O(1) 5D Yukawa couplings and made a fit of the quarkmasses and CKM matrix elements in both models. This method allows to identifythe percentage of points consistent with a given KK mass, which in turnprovides us with a measure for the required fine-tuning. Comparison withcurrent experimental data on Rb, FCNC and CP violating operators exhibits animproved behavior of our model with respect to the RS model. In particular,allowing 10% fine-tuning the combined results point towards upper bounds on theKK gauge boson masses around 3.3 TeV in our model as compared with 13 TeV inthe RS model. One reason for this improvement is that fermions in our model areshifted, with respect to fermions in the RS model, towards the UV brane thusdecreasing the strength of the modifications of electroweak observables.

Flavor Phenomenology in General 5D Warped Spaces