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We present a complete study of Delta S = 2 and Delta B = 2 processes in awarped extra dimensional model with a custodial protection of Z b_L bar b_L,including epsilon_K, Delta M_K, Delta M_s, Delta M_d, A^q_SL, Delta Gamma_q,A_CP(B_d -> psi K_S) and A_CP(B_s -> psi phi). These processes are affected bytree level contributions from Kaluza-Klein gluons, the heavy KK photon, newheavy electroweak gauge bosons Z_H and Z', and in principle by tree level Zcontributions. We confirm recent findings that the fully anarchic approachwhere all the hierarchies in quark masses and weak mixing angles aregeometrically explained seems implausible and we confirm that the KK mass scaleM_KK generically has to be at least ~20TeV to satisfy the epsilon_K constraint.We point out, however, that there exist regions in parameter space with onlymodest fine-tuning in the 5D Yukawa couplings which satisfy all existing DeltaF = 2 and electroweak precision constraints for scales M_KK ~3TeV in reach ofthe LHC. Simultaneously we find that A_CP(B_s -> psi phi) and A^s_SL can bemuch larger than in the SM as indicated by recent results from CDF and D0 data.We point out that for B_{d,s} physics Delta F = 2 observables the complex(Z_H,Z') can compete with KK gluons, while the tree level Z and KK photoncontributions are very small. In particular we point out that the Z d^i_L bard^j_L couplings are protected by the custodial symmetry. As a by-product weshow the relation of the RS flavour model to the Froggatt-Nielsen mechanism andwe provide analytic formulae for the effective flavour mixing matrices in termsof the fundamental 5D parameters.

Delta F=2 Observables and Fine-Tuning in a Warped Extra Dimension with Custodial Protection