Measurement of the Branching Fraction for the Cabibbo-Suppressed Decay τ-→K-ντ

The branching fraction for the Cabibbo-suppressed decay τ-→K-ντ is measured from data obtained with the Mark II detector at SPEAR. Fifteen events containing a K± in coincidence with a muon or electron of opposite charge are observed. It is determined that B(τ-→K-ντ)=(1.3±0.5)%. © 1982 The American Physical Society.