Pure annihilation type B→K₀^*±(1430)K^(*)± decays in the family non-universal Z' model

By assuming that the scalar meson K₀^*(1430) belongs to the first excited states or the lowest lying ground states of qq-bar', we study the pure annihilation-type decays B±K₀^*±(1430)K^(*)± in the QCD factorization approach. Within the Standard Model, the branching fractions are of the order of 10^-8-10^-7, which is possible to measure in the ongoing LHCb experiment or forthcoming Belle-II experiment. We also study these decays in the family non-universal Z' model. The results show that if m_Z' ≈ 600 GeV (ζ = 0.02), both the branching fractions and CP asymmetries of B-bar⁰→K₀^*+(1430)K^- could be changed remarkably, which provides us with a place for probing the effect of new physics. These results could be used to constrain the parameters of the Z' model. (authors)