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tau

(τ) The 19th letter of the Greek alphabet, used in stellar nomenclature usually to designate the 19th-brightest star in a constellation or sometimes to indicate a star's position in a group.
References in periodicals archive ?
However, being the most massive and shortest-lived lepton, the tau lepton travels only about a millimeter before breaking apart.
About 3,500 times heavier than the electron, the tau lepton is a member of the same family of subatomic particles as the top and bottom quarks (SN: 7/1/95, p.10).
The tau lepton is in principle a very promising source of CLFV decays.
Masso, "Improved bounds on the electromagnetic dipole moments of the tau lepton," Physics Letters B, vol.
The researchers analyzed the data gathered at the LHC between 2011 and 2012, combining the Higgs decays into bottom quarks and tau leptons, both of which belong to the fermion particle group and the results revealed that an accumulation of these decays comes about at a Higgs particle mass near 125 gigaelectron volts (GeV) and with a significance of 3.8 sigma.