Branching Fractions and CP Asymmetries of B --> K_0*(1430) rho and B --> K_0^*(1430) phi Decays in the Family Nonuniversal Z' Model

TL;DR

This paper analyzes B meson decays involving K_0*(1430) in the context of the standard model and a family nonuniversal Z' model, highlighting the impact of annihilation terms and potential for new physics detection.

Contribution

It provides a detailed comparison of decay predictions in the standard and Z' models, emphasizing the role of annihilation effects and CP asymmetries in identifying new physics.

Findings

Z' boson can significantly alter certain branching fractions.

Annihilation terms are crucial and introduce main uncertainties.

CP asymmetries could help identify the K_0*(1430) meson and new physics.

Abstract

In this work, within the QCD factorization approach, we investigate the branching fractions and CP asymmetries of decays $B \to K_0^*(1430)\rho$ and $B \to K_0^*(1430)\phi$ under two different scenarios both in the standard model and the family nonuniversal $Z^\prime$ model. We find that the annihilation terms play crucial roles in these decays and lead to the main uncertainties. For decays $B^- \to \bar K_0^{*-} (1430)\rho^0 (\omega)$, the new $Z^\prime$ boson could change branching fractions remarkably. However, for other decays, its contribution might be clouded by large uncertainties from annihilations. Unfortunately, neither the standard model nor $Z^\prime$ model can reproduce all experimental data under one certain scenario. We also noted that the CP asymmetries of $B^-\to \bar K_0^{*-}(1430) \rho^0 (\omega)$ could be used to identify the$K_0^*(1430)$ meson and search for the new physics contribution.