CP phase of nonuniversal Z′ on sin ϕsJ / Ψ ϕ and T-odd observables of over(B, ̄)q → Vq ℓ+ ℓ-

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The evidence of a large CP phase has been shown by CDF and DØ collaborations in the time-dependent CP asymmetry (CPA) of Bs → J / Ψ φ{symbol} decay, where the nonvanished CPA clearly implies the existence of a non-Kobayashi-Maskawa phase in b → s transition. We study the new phases originated by the extra family-dependent U (1) model and examine their impact on over(T, ̂) or CP violating observables in over(B, ̄)q → Vq+- decays with Vq = K* (φ{symbol}). Adopting the constraints from the current data of Δ ms and the branching ratios for over(B, ̄)s → μ+ μ- and over(B, ̄)q → Vq+-, we find that φ{symbol}sJ / Ψ φ{symbol} = - (0.26 ± 0.22) and the T-odd observables of above 10% in the decay chain over(B, ̄)q → Vq (→ K π [K K]) ℓ+- can be achieved. In addition, we demonstrate that the longitudinal and transverse polarizations of K* and the up-down asymmetry of K in the same decay chain are also sensitive to the Z-mediated effects.

Original languageEnglish
Pages (from-to)160-164
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2-3
Publication statusPublished - 2010 Jan 18


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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