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arXiv 2007.06061hep-ph
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$B$衰变中的CP破坏（及寻找新物理）

CP Violation in $B$ Decays (and the Search for New Physics)

David London

备注：
Talk given at FPCP2020. 8 pages, 2 figures
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摘要：

在这次演讲中，我回顾了多年来在$B$衰变中对CP破坏观测量进行的各种测量。这些包括间接CP不对称、直接CP不对称和三重乘积。所有这些都是在寻找新物理学（NP）的背景下讨论的。NP的唯一线索出现在（i）$B \to πK$衰变和（ii）三体$B \to Kππ$和$B \to K {\bar K}K$衰变中，其中提取的（循环级）$γ$值可能与使用（树级）$B^+ \to D^{(*)} K^{(*)+}$衰变发现的值不同。CP破坏观测值也可以用来区分提出来解释$b \to sμ^+ μ^-$和$b \to c τ{\barν}_τ$衰变中观察到的电流异常的模型。

英文摘要：

In this talk, I review the various measurements that have been made over the years of CP-violating observables in $B$ decays. These include indirect CP asymmetries, direct CP asymmetries, and triple products. All are discussed in the context of the search for new physics (NP). The only hints of NP have appeared in (i) $B \to πK$ decays and (ii) 3-body $B \to Kππ$ and $B \to K {\bar K}K$ decays, where the extracted (loop-level) value of $γ$ may differ from the value found using (tree-level) $B^+ \to D^{(*)} K^{(*)+}$ decays. CP-violating observables may also be used to distinguish among the models proposed to explain the current anomalies observed in $b \to sμ^+ μ^-$ and $b \to c τ{\barν}_τ$ decays.

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