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arXiv 2603.11348hep-ph
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K_Sπν_τ衰变中的CP破坏

CP violation in two meson tau decays

Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional(墨西哥国立理工学院高级研究中心)

Daniel A. López Aguilar

AI总结:

本文通过有效场论分析τ衰变中的CP破坏现象,探讨其在K_Sπ和K±K_S模式中的实验敏感性,以解释BaBar异常。

摘要:

在τ→K_Sπν_τ衰变中观察到的CP破坏现象近期引起了广泛关注,这是因为对应的率不对称性出现了BaBar异常。在有效场论框架下,只有极端精细调整才能解释这种测量,目前正被Belle(-II)实验所审视,未来将在超重夸克-tau工厂中进一步研究。本文总结了将相同框架应用于其他双介子tau衰变通道的结果,这有助于解决这一难题。我们的主要结论是当前和未来的实验将对相关K±K_S模式中允许的最大CP率不对称性敏感,测量精度为5%,将要么支持要么对BaBar异常提出进一步质疑。

英文摘要:

CP violation in $τ\to K_S πν_τ$ decays has attracted a lot of attention recently, due to the BaBar anomaly in the corresponding rate asymmetry. Within an effective field theory formalism, only extreme fine-tuning would allow to understand such measurement, which is currently being scrutinized at Belle(-II), as will be in the future super-charm-tau factory. Here we summarize the results of applying the same formalism to the other two-meson tau decay channels, which can help solve this conundrum. Our main conclusion is that current and future experiments would be sensitive to the maximum allowed CP rate asymmetry in the related $K^\pm K_S$ modes with a measurement having 5$\%$ precision, that will either support or cast further doubts on the BaBar anomaly.

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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