Pure Annihilation Type $B \to K_0^{*\pm}(1430)K^{(*)\mp}$ Decays in the Family Non-universal $Z^\prime$ Model

TL;DR

This paper investigates rare B meson decays involving scalar mesons within the standard model and a family non-universal Z' model, predicting measurable branching ratios and potential new physics effects for experimental testing.

Contribution

It provides the first analysis of $B o K_0^*(1430)K^{(*)}$ decays in the Z' model, highlighting how new physics can significantly alter decay observables.

Findings

Branching ratios are around 10^{-8} to 10^{-7} in the standard model.

Z' model can notably enhance decay rates and CP asymmetries.

Results can constrain Z' model parameters.

Abstract

By assuming that the scalar meson $K_0^*(1430)$ belongs to the first excited states or the lowest lying ground states, we study the pure annihilation-type decays $B \to K_0^{*\pm}(1430)K^{(*)\mp}$ in the QCD factorization approach. Within the standard model, the branching fractions are at the order of $10^{-8}-10^{-7}$, which is possible to be measured in the ongoing LHCb experiment or forthcoming Belle-II experiment. We also study these decays in the family non-universal $Z^\prime$ model. The results show that if $m_{Z^\prime}\approx 600\mathrm{GeV}$ ($\zeta=0.02$), both the branching fractions and $CP$ asymmetries of $\overline B^0\to K_0^{*+}(1430)K^-$ could be changed remarkably, which provides us a place for probing the effect of new physics. These results could be used to constrain the parameters of $Z^\prime$ model.