tau lepton


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tau lepton

n.
The flavor of lepton that belongs to the third generation of elementary fermions and has a negative electric charge, a mass 3.477 times that of an electron, and a mean lifetime of about 2.9 × 10-13 second. Also called tauon.
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References in periodicals archive ?
SLAC physicists have won three Nobel prizes for discoveries of quarks and an elementary particle called the tau lepton, known today as fundamental building blocks of matter.
Until now, experimenters could find only hints of tau neutrinos' presence, such as energy and momentum missing from decays of the particle called a tau lepton.
Perl's 1975 discovery of a new elementary particle known as the tau lepton, a super-heavy cousin of the electron, not only gained him the Nobel Prize, but also the Wolf Prize in 1982.