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

Abstract

In this work, within the QCD factorization approach, we investigate the branching fractions and CP asymmetries of decays $B\to K_0^{\ast }(1430)\rho$ and $B\to K_0^{\ast }(1430)\varphi$ 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 $B^{-}\to {\bar{K}}_0^{\ast -}(1430){\rho }^0(\omega )$, 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 $B^{-}\to {\bar{K}}_0^{\ast -}(1430){\rho }^0(\omega )$ could be used to identify the$K_0^{\ast }(1430)$ meson and search for the new physics contribution.

Comments: arXiv admin note: text overlap with arXiv:hep-ph/0508104