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arXiv 1902.00893hep-ph
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用低能宇称违反对抗$B$异常

Confronting $B$ anomalies with low energy parity violation

G. D'Ambrosio, A. M. Iyer, F. Piccinini, A. D. Polosa

摘要:

间接搜索有可能探索直接搜索范围之外的尺度。本文考虑质子$Q_W^p$和铯原子$Q_W^{Cs}$的弱电荷对$B$介子衰变中轻子味非普适性破坏(LFUV)解的影响.工作在一个通用的实现最小的$Z^\prime$模型,我们假设的主要贡献是由于电子,以方便与低$q^2$奇偶违反实验比较。我们证明了这一结论的特征在于不同的限制行为取决于轻子流的手征。在这项研究中开发的相关性证明了研究不同实验之间的协同作用的有效性,从而更深入地了解现有数据的解释。它表明,一个可能的未来改进的奇偶违反实验可以有深远的影响,在直接搜索的背景下。我们还评论的前景,除了μ子的适合和它在改善模型的$Z'$的约束中发挥的作用。这提供了对NP与轻子耦合模式的补充理解,强烈暗示要么只有μ子,要么是异常的组合解决方案。

英文摘要:

Indirect searches have the potential to probe scales beyond the realm of direct searches. In this letter we consider the implications of two parity violating experiments: weak charge of proton $Q_W^p$ and the Caesium atom $Q_W^{Cs}$ on the solutions to lepton flavour non-universality violations (LFUV) in the decay of $B$ mesons. Working in a generic implementation of a minimal $Z^\prime$ model, we assume the primary contribution being due to the electron to facilitate comparison with the low $q^2$ parity violating experiments. We demonstrate that the conclusion is characterized by different limiting behavior depending on the chirality of the lepton current. The correlation developed in this study demonstrates the effectiveness in studying the synergy between different experiments leading to a deeper understanding of the interpretation of the existing data. It is shown that a possible future improvement in the parity violating experiments can have far reaching implications in the context of direct searches. We also comment on the prospect of addition of the muon to the fits and the role it plays in ameliorating the constraints on models of $Z'$. This offers a complimentary understanding of the pattern of the coupling of the NP to the leptons, strongly suggesting either a muon only or a combination of solutions to the anomalies.

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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