The anomalous eμ and 2-prong μx events produced in e+e- annihilation are used to determine the properties of the proposed τ charged lepton. We find the τ mass is 1.90 ± 0.10 GeV/c2; the mass of the associated neutrino, ντ, is less than 0.6 GeV/c2 with 95% confidence; V - A coupling is favored over V + A coupling for the τ - ντ current; and the leptonic branching ratios are 0.186 ± 0.010 ± 0.028 from the eμ events and 0.175 ± 0.027 ± 0.030 from the μx events where the first error is statistical and the second is systematic.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physics Letters B|
|State||Published - Oct 24 1977|
ASJC Scopus subject areas
- Nuclear and High Energy Physics