Search for Lepton Flavor Violation in Upsilon Decays

Details Search for Lepton Flavor Violation in Upsilon Decays Search for Lepton Flavor Violation in Upsilon Decays

2008-07-17

arxiv.org/abs/0807.2695v1

Phys.Rev.Lett.101:201601,2008

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 3 figures, available through http://www.lns.cornell.edu/public/CLNS/, submitted to PRL

Scientific paper

10.1103/PhysRevLett.101.201601

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. We interpret our results in terms of the exclusion plot for the energy scale of a hypothetical new interaction versus its effective LFV coupling in the framework of effective field theory.

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