Search for lepton flavour violating decays and at BaBar

We report on recent searches for lepton flavour violating decays of the τ lepton: , . These preliminary results use data samples collected by the BaBar detector at the SLAC PEP-II B factory corresponding to integrated luminosities of 469 fb−1 for the and 451 fb−1 for the searches. No statistically significant signal has been observed in any of these channels and we set upper limits on their branching fractions between 0.8–18.2×10−8 at 90% confidence level.