论文标题
ckm最喜欢的准体的分析
Analysis of CKM-Favored Quasi-Two-Body $B \to D (R\to) K π$ Decays in PQCD Approach
论文作者
论文摘要
LHCB协作研究了$ b_s \ to \ overline {d}^0k^0k^-π^+$ $衰减的共振结构，它是基于与$ 3.0 {\ rm fb}^{ - 1} $ pp $ cullision的$ 3.0 {\ rm fb}^$ 3.0 {\ rm fb}^$ 3.0 {\ rm fb}^$ pp $ collision的数据样本的数据样本。 $ k^-π^+$组件已在振幅模型中进行了分析，其中衰减振幅被建模为相对于中间共振$ k^*（892）$，$ k_0^*（1430）$和$ k_2^*（1430）$的共振贡献。在实验结果的启发下，我们研究了在扰动QCD（PQCD）方法的框架中，在\ overline {d}^0Kπ$衰减中衰减的颜色最有颜色的Quasi-Two-two-two $ b \ to \ overline {d}^0kπ$衰变。我们通过引入$kπ$对的适当波函数来计算分支分数。我们的结果很好地一致，可用的数据可以在LHCB和Belle-II实验中进行测试。使用狭窄的宽度 - 附属物，我们还提取了相应的两体$ b \ to \ operline d r $衰减的分支分数，这些分支是同意以前的理论计算和误差中的实验数据。在标准模型中，这些衰减中没有$ CP $不对称，因为这些衰减仅由树木操作员支配。
LHCb Collaboration studied the resonant structure of $B_s\to \overline{D}^0K^-π^+$ decays using the Dalitz plot analysis technique, based on a data sample corresponding to an integrated luminosity of $3.0{\rm fb}^{-1}$ of $pp$ collision. The $K^-π^+$ components have been analyzed in the amplitude model, where the decay amplitude is modeled to be the resonant contributions with respect to the intermediate resonances $K^*(892)$, $K_0^*(1430)$ and $K_2^*(1430)$. Motivated by the experimental results, we investigate the color-favored quasi-two-body $B \to \overline{D}^0Kπ$ decays in the framework of the perturbative QCD (PQCD) approach. We calculate the the branching fractions by introducing the appropriate wave functions of $Kπ$ pair. Our results are in agreement well the available data, and others can be tested in LHCb and Belle-II experiments. Using the narrow-width-approximation, we also extract the branching fractions of the corresponding two-body $B\to \overline D R$ decays, which agree to the previous theoretical calculations and the experimental data within the errors. There are no $CP$ asymmetries in these decays in the standard model, because these decays are all governed by only the tree operators.
