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

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

2006-07-28

arxiv.org/abs/hep-ph/0607313v2

JHEP 0702:087,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

published version in JHEP, CP-violating effects included

Scientific paper

10.1088/1126-6708/2007/02/087

Recent CDF measurement of the Bs-Bs 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 Bd-Bd 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. We adopt the universal 5D Yukawa coupling model where all Yukawa couplings are of order one. The SM fermion mass spectra and mixings are controlled by the bulk Dirac mass parameters. With two versions of the hadronic parameter values, we investigate the implication of the observed BB mixings on this model. The CP-violating effects on the Bd system is shown to provide very strong constraint: The first Kaluza-Klein mass of a gluon has its lower bound about 3.7 TeV with 1 sigma uncertainty.

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