RD(*) in custodial warped space

Flavor physics experiments allow to probe the accuracy of the Standard Model ( SM) description at low energies, and are sensitive to new heavy gauge bosons that couple to quarks and leptons in a relevant way. The apparent anomaly in the ratios of the decay of B - mesons into D - mesons and di ff erent lepton avors, RD() = B ( B ! D()) =B ( B ! D()`) is particularly intriguing, since these decay processes occur at tree- level in the SM. Recently, it has been suggested that this anomaly may be explained by new gauge bosons coupled to right- handed currents of quarks and leptons, involving light right- handed neutrinos. In this work we present a well- motivated ultraviolet complete realization of this idea, embedding the SM in a warped space with an SU( 2) L SU( 2) R U( 1) B bulk gauge symmetry. Besides providing a solution to the hierarchy problem, we show that this model, which has an explicit custodial symmetry, can explain the RD() anomaly and at the same time allow for a solution to the RK() anomalies, related to the decay of B - mesons into K - mesons and leptons, RK() = B ( B ! K()) =B ( B ! K()ee). In addition, a model prediction is an anomalous value of the forward- backward asymmetry Ab FB, driven by the Zb RbR coupling, in agreement with LEP data.