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arXiv 2602.01534hep-phhep-ex
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ρ(770,1450,1700)→K K̄和ω(782,1420,1650)→K K̄子过程对B→η(′)K K̄三体衰变的贡献

Contributions of the subprocesses $ρ(770,1450,1700)\to K \bar{K}$ and $ω(782,1420,1650)\to K \bar{K}$ for the three-body decays $B\to η^{(\prime)} K\bar{K}$

Shanxi University(山西大学);Nanjing Institute of Technology(南京工程学院)

Ming-Yue Jia, Jia-Xin Wang, Li-Fei Yang, Ai-Jun Ma, Wen-Fei Wang

AI总结:

本文基于perturbative QCD方法,分析了ρ和ω共振子过程对B→ηK K̄衰变的贡献,计算了CP平均分支比和直接CP不对称性,发现虚拟贡献与共振贡献相当。

摘要:

作为先前工作的延伸,我们采用perturbative QCD方法分析了B→η(′)K K̄三体衰变中K K̄对来自ρ(770)、ω(782)及其激发态的子过程贡献。通过使用K矢量时间反演形式因子,将ρ(770,1450,1700)→K K̄和ω(782,1420,1650)→K K̄子过程的信息包含在K K̄系统分布振幅中。我们计算了相关近二体B介子衰变的CP平均分支比和直接CP不对称性。发现虚拟贡献的分支比与共振贡献相当。因此,这些贡献构成了三体衰变中应考虑的重要部分。本文的所有预测预计将在未来由LHCb和Belle-II实验测试。

英文摘要:

As an extension of our prior work, we analyze the resonance contributions for the kaon pair originating from the intermediate $ρ(770)$, $ω(782)$ and their excited states in the three-body decays $B\to η^{(\prime)} K\bar{K}$ within the perturbative QCD approach. The information of subprocesses $ρ(770,1450,1700)\to K\bar K$ and $ω(782,1420,1650)\to K\bar K$ are included in the distribution amplitudes for $K\bar K$ system by using the kaon vector time-like form factors. We calculate the $CP$ averaged branching fractions and the direct $CP$ asymmetries for the relevant quasi-two-body $B$ meson decays. The branching fractions of the virtual contributions for $K\bar K$ from the Breit-Wigner formula tails of $ρ(770)$ and $ω(782)$ for these decays are found comparable to the corresponding contributions from the resonances $ρ(1450,1700)$ and $ω(1420,1650)$. Consequently, they constitute a significant component that should be accounted for in the considered three-body decays. All the predictions in this work are expected to be tested by the LHCb and Belle-II experiments in the future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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