Tauon

The tauon, or tau lepton, is a negatively charged elementary particle with a lifetime of 3×10−13 seconds and a high mass of 1777 MeV (compared to 939 MeV for protons and 0.511 MeV for electrons). It has an associated antiparticle (the anti-tauon) and neutrinos (the tau neutrino and tau antineutrino).

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The tau lepton belongs to the 3rd generation of leptons. It is the third generation counterpart of the electron (1st generation) and the muon (2nd generation). Like the electron and muon, the tau lepton appears to be pointlike; no structure has been detected, and if there is any, it would have to be on a scale of less than 10−18 meters. Also, like the electron and muon, the tauon has a spin of 1/2. The tau lepton and its antiparticle carry the same electric charges as the electron and positron, respectively.

Elementary particle: :The Elementary Particles is also a novel by Michel Houellebecq, translated by Frank Wynne...

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Tau neutrino: REDIRECT Tauon neutrino...