论文标题
对三体$ b \ kkk $衰减的共振贡献
Resonant Contributions to Three-body $B\to KKK$ Decays in Perturbative QCD Approach
论文作者
论文摘要
在这项工作中，我们研究（$ s $，$ p $和$ d $） - $ k^+k^ - $ b \ $ b \ of to kkk $衰减在扰动QCD方法中的领先顺序。在描述不同波的Kaon对中描述非扰动动力学的两膜波函数中，我们计算了相应共振区域中这些衰减模式的分支级分和直接$ CP $不对称。我们的大多数数值结果与当前的测量结果非常一致。我们注意到，窄宽度近似无效，在Quasi-Two-two-two-body衰减$ b \ to KF_0（980）\至kkk $。对于其他衰变，在狭窄的宽度近似下，我们可以提取涉及中间共振状态的相应两体衰变的分支部分，相关的分支部分与当前的实验数据一致。此外，我们还可以预测，相应的准二体衰变$ b \ tokπ^+π^ - $，预计将在正在进行的LHCB和Belle-II实验中测量。
In this work, we study the ($S$, $P$ and $D$)-wave $K^+K^-$ contributions to $B\to KKK$ decays 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 direct $CP$ asymmetries 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 $B\to Kf_0(980)\to KKK$. 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 corresponding quasi-two-body decays $B\to Kπ^+π^-$, which are expected to be measured in the ongoing LHCb and Belle-II experiments.
