Constraint ofB0d,s-bar B0d,smixing on warped extra-dimension model

Recent CDF measurement of the Bs-Bs oscillation frequency, at the Tevatronimposes significant constraint on various models for new physics. A warpedextra-dimension model with custodial isospin symmetry accommodates the Bd-Bdmixing at tree level mainly through the Kaluza-Klein gluons. This is due to themisalignment between the bulk gauge eigenstates and the localized Yukawaeigenstates of the bulk fermions. We adopt the universal 5D Yukawa couplingmodel where all Yukawa couplings are of order one. The SM fermion mass spectraand mixings are controlled by the bulk Dirac mass parameters. With two versionsof the hadronic parameter values, we investigate the implication of theobserved BB mixings on this model. The CP-violating effects on the Bd system isshown to provide very strong constraint: The first Kaluza-Klein mass of a gluonhas its lower bound about 3.7 TeV with 1 sigma uncertainty.Comment: published version in JHEP, CP-violating effects include