An upper limit on the branching ratio for tau decays into seven charged particles

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) ~ M_Z. 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.

13 pages LaTeX, uses a4p.sty, 4 eps figures included, accepted by Physics Letters B

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