Search for Lepton Flavor Violation in ${\rm Y}(3S)\to e^{\pm }{\mu }^{\mp }$

BABAR Collaboration

We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a $b$~quark and $b$~antiquark bound state. We look for the LFV decay $Υ(3S)\rightarrow…