Anomalies from the LHCb lepton flavour universality and Fermilab muon anomalous magnetic moment show tantalizing hints of possible new physics from the lepton sectors. Due to its large mass and shorter lifetime than muon, the tau lepton is believed to couple more to possible new physics beyond the Standard Model. Traditionally, tau leptons are probed through their decay products due to tau’s short lifetime. On the other hand, at a high energy scale, a large fraction of tau leptons could be boosted to a much longer lifetime and fly a visible distance from several centimetres up to kilometer length scale yet very informative to new physics beyond the standard model or high energy cosmic rays. In this article, we investigate rare, yet promising, tau-physics phenomena, where long-lived taus are exploited either as a microscope (for the measurement of tau’s anomalous magnetic moment to an unprecedented level of accuracy) or as a macroscope (for the detection of 1 TeV to 1 PeV cosmic neutrinos).

中文翻译：

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将 Tau Lepton 提升为显微镜和宏观显微镜

LHCb 轻子风味普遍性和费米实验室 μ 子异常磁矩的异常显示出轻子领域可能出现的新物理学的诱人暗示。由于它的质量比 μ 子大且寿命短，人们相信 tau 轻子与标准模型之外的可能的新物理有更多的耦合。传统上，由于 tau 的寿命很短，因此通过它们的衰变产物来探测 tau 轻子。另一方面，在高能尺度上，大部分 tau 轻子可以被提升到更长的寿命，并在几厘米到千米长的尺度上飞行可见距离，但对超出标准模型或高能量的新物理学非常有用能量宇宙射线。在这篇文章中，我们研究了罕见但有希望的 tau 物理现象，