Abstract
In the two-quark model supposition for the meson a0(1450), which can be viewed as either the first excited state (scenario I) or the lowest lying state (scenario II), the branching ratios and the direct CP-violating asymmetries for decays B → a0(1450)ρ(ω) are studied by employing the perturbative QCD factorization approach. We find the following results: (a) For the decays B− → a00(1450)ρ− and B̄0 → a+0(1450)ρ−, their branching ratios have large difference between two scenarios. Although their branching ratios are larger than other considered decay modes, their direct CP-violating asymmetries in both scenarios are small. (b) For the decays B− → a−0(1450)ρ0 and B̄0 → a−0(1450)ρ+, a00(1450)ρ0, a00(1450)ω, their branching ratios are close to each other between two scenarios, respectively. (c) Comparing with the decays B̄0 → π0ρ0, π0π0, the decay B̄0 → a00(1450)ρ0 receives a larger branching ratio in each scenario, which is sensitive to the variation of the Cabibbo—Kobayashi—Maskawa angle α.
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