This Letter presents a measurement of the decay τ-→ρ-ντ using data obtained with the Mark II detector at SPEAR. In the center-of-mass energy region 4.5<~Ec.m.<~6.0 GeV 85 events are observed in which a charged ρ was found in coincidence with either an electron or a muon. It was determined that B(τ-→ρ-ντ)=(20.5±4.1)% and the ratio B(τ-→ρ-ντ)B(τ-→e-ντν̄e)=1.11± 0.23. © 1979 The American Physical Society.

Events of the type e+e-e+e-(958) have been observed with the Mark II detector at SPEAR by detecting the decay mode 0. From the observed cross section and known branching fractions of the is =5.91.61.2 keV and the total width is =3009060 keV (statistical and systematic errors). © 1979 The American Physical Society.