Constraint of B_{d,s}-bar{B}_{d,s} mixing on warped extra-dimension model

Recent CDF measurement of the B_s-bar{B}_s oscillation frequency at the Tevatron imposes significant constraint on various models for new physics. A warped extra-dimension model with custodial isospin symmetry accommodates the B_{d,s}-bar{B}_{d,s} mixing at tree level mainly through the Kaluza-Klein gluons. This is due to the misalignment between the bulk gauge eigenstates and the localized Yukawa eigenstates of the bulk fermions. Considering the large hadronic uncertainties in the standard model calculations, we adopted two versions of the hadronic parameter values. We found that the lower bound on the first Kaluza-Klein mass of a gluon by the observed B_{d,s}-bar{B}_{d,s} mixing is, irrespective to hadronic uncertainties, about 2 TeV if the complex phases in the 5D Yukawa sector are large enough