Charged lepton flavour-violating transitions would be a clear signal of new physics beyond the Standard Model. Their search has been carried out in a variety of channels, the most sensitive being those involving a muon: however no positive evidence has been found so far. The MEG experiment has recently set the best limit on such processes by investigating the existence of the μ → eγ decay. In the next decade several experiments are planned to pursue the search for ß → eγ, μ →> eee, μ → e conversion in nuclei, as well as on processes involving the τ, to an unprecedented level of precision. In this review we want to give a pedagogical introduction on the theoretical motivations for such searches as well as on the experimental aspects upon which they are based.

中文翻译：

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带电轻子味道违规：实验和理论介绍

带电轻子违反味道的转变将是标准模型之外新物理的明确信号。他们的搜寻是通过多种渠道进行的，最敏感的是涉及μ子的渠道；但是，到目前为止，尚未找到任何积极的证据。MEG实验最近通过研究μ →eγ衰变的存在，为此类过程设定了最佳极限。在接下来的十年中，计划进行几次实验以寻求ß → eγ，μ →> eee，μ → e原子核以及涉及τ的过程中的转换达到前所未有的精度。在这篇综述中，我们想对这种搜索的理论动机以及它们所基于的实验方面进行教学上的介绍。