2008/08/31 by Chuan-Hung Chen, Chao-Qiang Geng, Lin Li
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2008.11.008
published as Phys.Lett.B670:374-377,2009 · 10 pages, 2 figures, version revised, references added, version to appear in Physics Letters B
arxiv created 2008/11/05 · openalex publication_date 2008/11/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A large CP-violating phase uncovered recently by CDF and DØ collaborations in the time-dependent CP asymmetry (CPA) of the Bs→ J/Ψϕ decay clearly indicates that a non-Cabibbo-Kobayashi-Maskawa (CKM) phase has to be brought into the b→ s transition. We find that the model with SU(2)L singlet exotic quarks can not only provide the new phase induced from the Z-mediated flavor changing neutral current (FCNC) at tree level, but also strongly relate the Bs- Bs mixing, Bq→ Vq ℓ+ ℓ- (Vd[s]=K^*[ϕ]) and Bs→ μ+ μ- together. In particular, we show that the new CP phase can be unambiguously exposed by the large statistical significances of T violating observables in Bq→ Vq ℓ+ ℓ-, while the branching ratio of Bs→ μ+ μ- can be enhanced to be O(10-8).