An upper limit on the branching ratio for tau decays into seven charged particles
The OPAL Collaboration, K. Ackerstaff et al
Abstract
We have searched for decays of the tau lepton into seven or more charged particles, using data collected with the OPAL detector from 1990 to 1995 in e+e- collisions at sqrt(s) ~ MZ. No candidate events were found and an upper limit on the branching ratio for tau decays into seven charged particles of 1.8 x 10-5 at the 95% confidence level was determined.
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