Decays of a heavy lepton involving the hadronic vector current

The decays of a heavy lepton involving the hadronic vector current are calculated from electron-positron-annihilation data. The result, ${Γ}({{τ}}^{{-}}{→}{{ν}}_{{τ}}+{(2n pions)}^{{-}})=1.69{Γ}({{τ}}^{{-}}{→}{{ν}}_{{τ}}+{e}^{{-}}{{{ν}}}ₑ)$ for ${M}_{{τ}}=1.9$ GeV and ${m}_{{{ν}}_{{τ}}}=0$, and its implications are discussed.