Abstract
We present a search for the lepton flavor violating decay using events collected by the BABAR experiment. The branching fraction for this decay can be substantially enhanced in new physics models. The kinematics of the tau from the signal decay are inferred from the , , and other in the event, which is fully reconstructed in one of a variety of hadronic decay modes, allowing the signal candidate to be fully reconstructed. We observe no excess of events over the expected background and set a limit of at 90% confidence level, where the branching fraction is for the sum of the and final states. We use this result to improve a model-independent bound on the energy scale of flavor-changing new physics.
- Received 9 August 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.201801
©2007 American Physical Society