论文标题
Tau Lepton的物理学
Physics of the tau lepton
论文作者
论文摘要
在我们目前的知识中，tau是最重的轻子，也是唯一一个腐烂的哈龙，这一事实使其成为一种非常丰富的现象学的来源。它代表了标准模型中的第三个瘦素家族，该功能有助于其分类但尚未断言其真正的含义。 Tau Lepton提供了：i）一个干净，独特的环境，用于研究QCD电流的强环化，在共鸣填充的能量区域，以及对模型相关参数的现象学确定； ii）由于标准模型的意外全局对称性，它们与MUON一起，具有非常约束的风味动态（在没有中微子肿块的情况下）。因此，Tau Lepton为在低能量下的QCD研究以及同时搜索新物理学带来了极好的基准。
Within our present knowledge, the tau is the heaviest lepton and the only one decaying into hadrons, a fact that makes it the source of a very rich phenomenology. It represents the third family of leptons in the Standard Model, a feature that helps its classification but whose real meaning is not asserted yet. The tau lepton provides: i) a clean and unique environment to study both the hadronization of QCD currents, in an energy region populated by resonances, and the phenomenological determination of relevant parameters of the Model; ii) together with the muon, they have a very constrained flavour dynamics (in the absence of neutrino masses) due to an accidental global symmetry of the Standard Model. In consequence, the tau lepton brings an excellent benchmark for the study of QCD at low energies and, at the same time, for the search of new physics.
