Search for Lepton Flavor Violation in Upsilon Decays

Understand

In this Letter we describe a search for lepton flavor violation (LFV) in the bottomonium system.

• We search for leptonic decays of Upsilon(nS)(n=1,2, and 3) into muon and tau using the data collected with the CLEO III detector.
• We identify the tau lepton using its leptonic decay into electron and utilize multidimensional likelihood fitting with PDF shapes measured from independent data samples.
• We report our estimates of 95% CL upper limits on LFV branching fractions of Upsilon mesons.