Resonant contributions to three-body B ->KKK decays in perturbative QCD approach
Resonant contributions to three-body B ->KKK decays in perturbative QCD approach
复制标题
对三体 B -> KKK 的共振贡献在微扰 QCD 方法中衰减
DOI：
10.1140/epjc/s10052-020-7925-7
复制
发表时间：
2020
影响因子：
4.4
通讯作者：
Xin Liu
中科院分区：
文献类型：
--
作者：
Zhi-Tian Zou;Ying Li;Qi-Xin Li;Xin Liu
本文用微扰QCD方法研究了首阶（S，PandD）波对衰变的贡献。在描述不同波的K介子对非微扰动力学的两介子波函数中，我们计算了这些衰变模在相应共振区的分支分数和直接CP不对称性。我们的大部分数值结果与目前的测量结果是一致的。我们注意到窄宽度近似在准二体衰变中是无效的。对于其他衰变，在窄宽度近似下，我们可以提取出相应的中间共振态两体衰变的分支分数，相关的分支分数与目前的实验数据符合得很好.此外，我们还预测了相应的准二体衰变的分支分数，预计将在正在进行的LHCb和Belle-II实验中进行测试。
In this work, we study the (S,PandD)-wavecontributions todecays in the perturbative QCD approach at leading order. Within the two-meson wave functions describing the nonperturbative dynamics in the kaon-pair for different waves, we calculate the branching fractions and the directCPasymmetries of these decay modes in the corresponding resonance regions. Most of our numerical results are well consistent with the current measurements. We note that the narrow-width approximation is invalid in the quasi-two-body decays. For other decays, under the narrow-width approximation we can extract the branching fractions of the corresponding two-body decays involving the intermediate resonant states, and the related branching fractions agree with the current experimental data well. Furthermore, we also predict the branching fractions of the corresponding quasi-two-body decays, which are expected to be tested in the ongoing LHCb and Belle-II experiments.