Constraint of Bd,s0-(B)over-bard,s0 mixing on wraped extra-dimension model

被引：19

作者：

Chang, Sanghyeon ^{[1
]}

Kim, Choong S.

Song, Jeonghyeon

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[2] Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 02期

关键词：

B-physics; beyond standard model;

D O I：

10.1088/1126-6708/2007/02/087

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Recent CDF measurement of the B-s(0)-B-s(0) 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(0)-B-d,s(0) 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 for B(Bd,s)f(Bd,s)(2), we investigate the implication of the observed B-d,s(0)-B-d,s(0) mixings on this model. The CP-violating effects on the B-d system is shown to provide very strong constraint: The first Kaluza-Klein mass of a gluon (M-KK) has its lower bound about 3.7TeV with 1 sigma uncertainty.

引用

页数：16

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