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• W1898691432 abstract "We investigate the CP-averaged branching ratios, the polarization fractions, the relative phases, and the CP-violating asymmetries of the penguin-dominated $B to phi K_1(1270) $ and $ phi K_1(1400)$ decays in the perturbative QCD(pQCD) approach, where $K_1(1270)$ and $K_1(1400)$ are believed to be the mixtures of two distinct types of axial-vector $K_{1A}(^3P_1)$ and $K_{1B}(^1P_1)$ states with different behavior, however, their mixing angle $theta_{K_1}$ is still a hot and controversial topic presently. By numerical evaluations with two different mixing angles $theta_{K_1} sim 33^circ$ and $58^circ$ and phenomenological analysis, we find that: (a) the pQCD predictions for the branching ratio, the longitudinal polarization fraction and the direct CP violation of $B^pm to phi K_1(1270)^pm$ decay with the smaller angle $33^circ$ are in good agreement with the currently available data; (b) though the central values significantly exceed the available upper limit, both pQCD predictions of $Br(B^pm to phi K_1(1400)^pm)$ with two different mixing angles are consistent with that obtained in QCD factorization and with the preliminary data in 2$sigma$ errors. These results and other relevant predictions for the considered decays will be further tested by the LHCb and the forthcoming Super-B experiments; (c) the weak annihilation contributions can play an important role in $B to phi K_1(1270)$ and $phi K_1(1400)$ decays; (d) these pQCD predictions combined with the future precision measurements can examine the reliability of the factorization approach employed here, but also explore the complicated QCD dynamics and mixing angle $theta_{K_1}$ of the axial-vector $K_1(1270)$ and $K_1(1400)$ system." @default.
• W1898691432 created "2016-06-24" @default.
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• W1898691432 date "2014-11-17" @default.
• W1898691432 modified "2023-10-08" @default.
• W1898691432 title "Penguin-dominatedB→ϕK1(1270)andϕK1(1400)decays in the perturbative QCD approach" @default.
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• W1898691432 doi "https://doi.org/10.1103/physrevd.90.094019" @default.
• W1898691432 hasPublicationYear "2014" @default.
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