论文标题
$ b_ {s} \ to k^0（\ edline k^0）k^\pmπ^\ mp $在pqccd方法中
Branching Fractions and CP Asymmetries of the Quasi-Two-Body Decays in $B_{s} \to K^0(\overline K^0)K^\pm π^\mp$ within PQCD Approach
论文作者
论文摘要
由$ b_s \ to k_sk^{\ mp}π^{\ pm} $衰减的第一个无标记的衰减时间综合分析的振幅分析的动机$ k_2^*（1430）$，我们全面研究Quasi-Two-two-two $ b_ {s} \至k^0/\ edline {\ kern -0.2em k}^0 k}^0 k^{\ pm}π^{\ mp} $基于$ k_t $分解的方法。在准二体空间区域中，通过采用适当的$kπ$配对波函数来描述$kπ$对中的kaon和pion之间的相互作用，与LHCB的实验结果相吻合。此外，在准体衰变的分支分支中，我们还计算了相应的两体衰变的分支分数，结果与LHCB测量值和较早的误差研究组成。对于这些被考虑的衰变，由于最终状态不是特定于口味的衰减，因此可以测量时间依赖的$ CP $。我们计算了六个$ CP $侵略可观察物，可以在正在进行的LHCB实验中进行测试。
Motivated by the first untagged decay-time-integrated amplitude analysis of $B_s \to K_SK^{\mp}π^{\pm}$ decays performed by LHCb collaboration, where the decay amplitudes are modeled to contain the resonant contributions from intermediate resonances $K^*(892)$, $K_0^*(1430)$ and $K_2^*(1430)$, we comprehensively investigate the quasi-two-body $B_{s} \to K^0/\overline{\kern -0.2em K}^0 K^{\pm}π^{\mp}$ decays, and calculate the branching fractions and the time-dependent $CP$ asymmetries within the perturbative QCD approach based on the $k_T$ factorization. In the quasi-two-body space region the calculated branching fractions with the considered intermediate resonances are in good agreement with the experimental results of LHCb by adopting proper $Kπ$ pair wave function, describing the interaction between the kaon and pion in the $Kπ$ pair. Furthermore,within the obtained branching fractions of the quasi-two-body decays, we also calculate the branching fractions of corresponding two-body decays, and the results consist with the LHCb measurements and the earlier studies with errors. For these considered decays, since the final states are not flavour-specific, the time-dependent $CP$ could be measured. We calculate six $CP$-violation observables, which can be tested in the ongoing LHCb experiment.
