论文标题
$ξ_{b}^{ - } \ rightarrow pk^{ - } k^{ - } $ decay中的共振贡献的研究
Study of the resonance contributions in the $Ξ_{b}^{-} \rightarrow pK^{-}K^{-}$ decay
论文作者
论文摘要
衰减过程$ξ_{b}^{ - } \ rightArrow pk^{ - } k^{ - } $通过考虑$ s $ s $ -wave Meson-baryon交互的贡献，以及最终的状态相互作用方法，以及$ d $ d $ d $ - d $ - d $ - d $ - d $ - wave $ s $ s $ -wave Meson-Baryon交互。低洼共振$λ（1405）$和$λ（1670）$具有重要的贡献，这两者都是从$ s $ wave与isospin $ i = 0 $的最终状态相互作用中动态生成的。此外，$λ（1520）$ state也有重要的贡献，距$ d $ - 波。通过这些共振贡献，较低$ pk^{ - } $不变的质量分布的实验数据得到了很好的描述。我们还讨论了与isospoin $ i = 1 $的$ S $波中另一种共振的贡献，这是不容忽视的。此外，对于相应的衰减通道获得的一些分支部分与实验测量相一致。
The decay process $Ξ_{b}^{-} \rightarrow pK^{-}K^{-}$ is studied with the final state interaction approach by considering the contributions from the $S$-wave meson-baryon interactions, and also the intermediate state $Λ(1520)$ in the $D$-wave. The low-lying resonances $Λ(1405)$ and $Λ(1670)$ have significant contributions, which are both dynamically generated from the $S$-wave final state interactions with isospin $I=0$. Furthermore, the $Λ(1520)$ state also has important contributions from $D$-wave. With these resonances contributions, the experimental data of the lower $pK^{-}$ invariant mass distributions are well described. We also discuss the contribution of another resonance in the $S$-wave with isospoin $I=1$, which cannot be ignored. Moreover, some of the branching fractions obtained for the corresponding decay channels are consistent with the experimental measurements.
