Lepton Flavour Violating $\tau$ decays

TL;DR

This paper reports on searches for lepton flavor violating tau decays at B-factories, setting upper limits on their branching ratios around 10^{-7} at 90% confidence level.

Contribution

It provides the first experimental upper limits on certain lepton flavor violating tau decays at B-factories.

Findings

Upper limits on branching ratios are approximately 10^{-7}.

No evidence of lepton flavor violation was observed.

Results constrain new physics models predicting such decays.

Abstract

Searches for lepton flavour violating $\tau$ $\ra$ lll and $\tau$ $\ra$ l$\gamma$ decays at the B-factories are presented. Upper limits on the branching ratios are obtained $\sim$ $O(10^{-7})$ at 90% confidence level.