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arXiv 2602.11997hep-ph
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重子$b$和$c$衰变的最新进展

Recent progress in decays of $b$ and $c$ hadrons

Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille, France(艾克斯-马赛大学、土伦大学、法国国家科学研究中心、理论物理中心)

Aoife Bharucha

AI总结:

研究$b$和$c$重子衰变中的异常现象及CKM元素测定进展,探讨中性电流异常和轻子普遍性比率的理论与实验现状。

摘要:

在过去十年中,$B$和$D$介子以及含有重$b$或$c$夸克的重子的衰变计算取得了巨大进展。推动这一进展的因素之一是测量了若干在$b\ o s$和$b\ o c$转换中的异常现象,这些是标准模型之外物理现象的唯一迹象之一。这些偏差包括分支比、角观测量和轻子普遍性比率的测量。另一个因素是确定CKM元素$V_{ub}$和$V_{cb}$时的排他性与包容性矛盾。我们将首先回顾最近涉及$b\ o s$和$c\ o u$转换的计算,这些计算可能有助于中性电流异常现象的解释。然后我们将总结确定CKM元素$V_{ub}$和$V_{cb}$的进展。最后我们将讨论当前理论状态和轻子普遍性比率在$b\ o s$和$b\ o c$半轻子衰变中的实验前景。

英文摘要:

In the last ten years there has been great progress in calculations of decays of $B$ and $D$ mesons, and baryons containing a heavy $b$ or $c$ quark. One propelling factor has been the measurement of several anomalies in $b\to s$ and $b\to c$ transitions, these are one of the only signs of physics beyond the Standard Model. The deviations included measurements of branching ratios, angular observables and lepton universality ratios. Another factor is the exclusive-inclusive discrepancy in the determination of the CKM elements $V_{ub}$ and $V_{cb}$. We will first review recent calculations involving $b\to s$ and $c\to u$ transitions that could shed light on the neutral current anomalies. We will then summarise the progress the determination of the CKM elements, $V_{ub}$ and $V_{cb}$. Finally we will discuss the current theoretical status and experimental prospects for the lepton universality ratios in $b\to s$ and $b\to c$ semileptonic decays.

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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