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arXiv 1806.09583hep-ph
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$B^{(*)}$,$D^{(*)}$的半轻子衰变为$ν l$和赝标或矢量介子

Semileptonic decays of $B^{(*)}$, $D^{(*)}$ into $ν l$ and pseudoscalar or vector mesons

L. R. Dai, X. Zhang, E. Oset

摘要:

我们进行了研究的$B^{(*)}$,$D^{(*)}$半轻子衰变,使用不同的方法比在传统的方法,在那里的弱运营商的矩阵元素进行评估和详细的自旋角动量代数进行,以获得非常简单的表达式在年底为不同的衰变模式。在$B$或$D$扇区中只使用一个实验衰变率,预测了其余衰变模式的衰变率,它们与实验符合得很好。在$τ$衰减模式中观察到一些差异,对此我们找到了解释。我们对$B^*$和$D^*$衰减率进行评估,可用于未来的测量,现在可以在LHCb合作中使用。

英文摘要:

We perform a study of the $B^{(*)}$, $D^{(*)}$ semileptonic decays, using a different method than in conventional approaches, where the matrix elements of the weak operators are evaluated and a detailed spin-angular momentum algebra is performed to obtain very simple expressions at the end for the different decay modes. Using only one experimental decay rate in the $B$ or $D$ sectors, the rates for the rest of decay modes are predicted and they are in good agreement with experiment. Some discrepancies are observed in the $τ$ decay mode for which we find an explanation. We perform evaluations for $B^*$ and $D^*$ decay rates that can be used in future measurements, now possible in the LHCb collaboration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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