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CP phase of nonuniversal $Z'$ on $\sinϕ^{J/Ψϕ}_s$ and T-odd observables of $\bar B_{q}\to V_{q} \ell^{+} \ell^{-}$

The evidence of a large CP phase has been shown by CDF and DØ collaborations in the time-dependent CP asymmetry (CPA) of $B_s\to J/Ψϕ$ decay, where the nonvanished CPA clearly implies the existence of a non-Kobayashi-Maskawa phase in $b\to s$ transition. We study the new phases originated by the extra family dependent $U(1)'$ model and examine their impact on $\hat{T}$ or CP violating observables in $\bar B_q\to V_q \ell^{+} \ell^{-}$ decays with $V_q=K^* (ϕ)$. Adopting the constraints from the current data of $Δm_s$ and the branching ratios for $\bar B_s\to μ^+ μ^-$ and $\bar B_q\to V_q\ell^+ \ell^-$, we find that $ϕ^{J/Ψϕ}_s=-(0.26\pm 0.22)$ and the T-odd observables of above 10% in the decay chain $\bar B_q\to V_q(\to Kπ[KK]) \ell^+ \ell^-$ 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.