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arXiv 1805.06705hep-phhep-ex
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在高精度前沿利用$B \to πK$衰减

Utilising $B \to πK$ Decays at the High-Precision Frontier

Robert Fleischer, Ruben Jaarsma, Eleftheria Malami, K. Keri Vos

摘要:

大约二十年来,$B\toπK$衰变是$B$ -衰变研究的焦点。我们发现,CP之间的相关性不对称的$B^0_d\toπ^0K_{\rm S}$揭示了紧张与标准模型。如果这是由于新物理学,一个修改的电弱企鹅部门提供了特别有趣的可能性。提出了一种新的方法来确定电弱企鹅参数,它使用的是一个同位旋关系,只需要最小的$SU(3)$输入。我们将其应用于$B\toπK$衰变的当前数据,并讨论了利用CP破坏$B^0_d\toπ^0K_{\rm S}$的前景。该战略具有令人兴奋的潜力,在$B$ -物理学的高精度时代,在电弱企鹅领域建立新物理学。

英文摘要:

For about twenty years, $B\toπK$ decays are in the focus of $B$-decay studies. We show that a correlation between the CP asymmetries of $B^0_d\toπ^0K_{\rm S}$ reveals a tension with the Standard Model. Should it be due to New Physics, a modified electroweak penguin sector provides particularly interesting possibilities. We present a new method to determine the electroweak penguin parameters, which uses an isospin relation and requires only minimal $SU(3)$ input. We apply it to the current data for $B\toπK$ decays and discuss the prospects for utilizing CP violation in $B^0_d\toπ^0K_{\rm S}$. The strategy has the exciting potential to establish New Physics in the electroweak penguin sector in the high-precision era of $B$-physics.

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