| 单词 | tau lepton |
| 释义 | > as lemmastau lepton b. A lepton with a mass of approx. 1777 MeV, a charge of −1, and spin of ½, which on decaying produces other leptons or else hadrons (typically pions), in each case with one or more neutrinos. More fully tau lepton, tau particle.The tau is similar to the other leptons, the electron and the muon, except that it has a much greater mass and a much shorter lifetime, and it is the only lepton that can decay into hadrons. ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > [noun] > unstable lepton tau1977 1977 G. J. Feldman & M. L. Perl in Physics Rep. 33C 339 This particle called the U during the initial studies..will be called the τ in this paper because it appears to be the third charged lepton to be found. 1977 M. L. Perl in Proc. Internat. Symp. Lepton & Photon Interactions at High Energies 146 The behavior of these [leptonic] events is consistent with the hypothesis that a new charged lepton, τ, exists with a mass of 1.9 ± 0.1 GeV/c2. 1980 Sci. Amer. July 60/1 More recently a third neutrino flavor has been added to accompany the newly discovered tau particle, which is a massive sibling of the electron and the muon. 1989 New Scientist 10 June 47/2 The tau lepton is far more massive than the electron. 2006 F. Wilczek Fantastic Realities 17 When cosmic rays collide with interstellar material, or impact our atmosphere, the debris of the collisions contains muons, taus, and heavy quarks. < as lemmas |
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