EXPERIMENTAL UPPER LIMITS ON BRANCHING FRACTIONS FOR UNEXPECTED DECAY MODES OF THE TAU LEPTON

摘要

Searches for12 neutrinos less decay modes of the tau which violate lepton number conservation have been made using the reaction e+e-T+T. No evidence for lepton number violation is observed, and we have set upper limits (90% C.L.) on the branching ratio for each decay mode. The branching ratio limits on the radiative decays T-Μ and T-eγ are .055% and .064% respectively. For the charged lepton decays T-μ, T-μ, T-μ, and T-μ, the branching ratio limits are .040%, .033%, .044%, and .049% respectively.