muon

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And in a cavern in Gran Sasso in Italy, the highest part of the Apennines, an experiment is looking at another oscillation, that between muon- and tau-neutrinos.
并且在意大利格朗萨索的一个山洞中（亚平宁山脉的最高区域）进行的一项实验，正在关注另一种震荡——缪子中微子和陶子中微子之间的震荡。
The team prepares a beam of just one type, muon neutrinos, sending them from Cern to an underground laboratory at Gran Sasso in Italy to see how many show up as a different type, tau neutrinos.
这个小组准备了一束单一类别的中微子即μ介子中微子并将它们由研究所射向位于意大利Gran Sasso地下的实验室来观察有多少变换了种类，τ介子中微子。
About 1% of the time the muon finds itself in the 2S state, where it can be excited to the 2P state by absorbing a photon from a laser pulse. The 2P state then decays with the emission of an X-ray.
大约1%的时间，μ介子自已找到2S能级位置，这个位置上μ介子可以吸收来自激光的一个量子被激发到2P能级，随后发出X光，2P能级位置随之下降。

This distance-related decline is strong evidence of a gradual shift from muon-to tau-flavoured neutrinos.
ECONOMIST: Neutrinos
But occasionally a neutrino reacts with an atom to create a particle called a muon.
ECONOMIST: Neutrino astronomy
But experiments have kept turning up almost equal numbers of electron and muon neutrinos.
ECONOMIST: Neutrinos

a type of elementary particle (= a very small piece of matter) with the same negative charge as an electron, but much larger

a positive or negative elementary particle with a mass 207 times that of an electron and spin . It was originally called the mu meson but is now classified as a lepton