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arXiv 2008.08468hep-ph
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在$B \rightarrow πK$衰变中探索新物理

Exploring New Physics in $B \rightarrow πK$ Decays

Eleftheria Malami

摘要:

B介子衰变在味物理中起着重要的作用。$B \rightarrow πK$衰变主要是由QCD圈图(企鹅),但也电弱企鹅,其中新物理可能进入,对衰变振幅有显着的影响。由于从B工厂的测量表明偏离标准模型的图片,我们执行一个国家的最先进的分析,探索CP不对称的相关性,并得到一个更新的图片。我们提出了一种策略,用于最佳确定的参数描述电弱企鹅效应,并将其应用到当前的数据,利用中性和带电$B \rightarrow πK$衰变。这种新方法可以在未来的Belle-II实验中得到充分利用,这将有望回答这个问题:这些衰变是否意味着新物理?

英文摘要:

B-meson decays play an important role in flavour physics. The $B \rightarrow πK$ decays are dominated by QCD loop diagrams (penguins) but also electroweak penguins, where New Physics may enter, have a significant impact on the decay amplitude. Since measurements from B-factories indicate deviations from the Standard Model picture, we perform a state-of-the-art analysis to explore the correlation of the CP asymmetries and to get an updated picture. We propose a strategy for the optimal determination of the parameters which describe electroweak penguin effects and apply it to current data, utilising both neutral and charged $B \rightarrow πK$ decays. This new method can be fully exploited at the future Belle-II experiment, which will hopefully answer the question: Do these decays imply New Physics?

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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