Is the lepton flavour changing observable in $Z\to {\mu }^{\pm }+{\tau }^{\mp }$ decay?

X. Y. Pham

Neutrino oscillations as suggested by the recent Super-Kamiokande result imply that lepton numbers could be violated, and Z$\to {\mu }^{\mp }+{\tau }^{\pm }$ is a typical manifestation. We poi…