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Search for Charged Lepton Flavor Violation in Narrow Υ Decays

Lees, J. P. et al. (2010) Search for Charged Lepton Flavor Violation in Narrow Υ Decays. Physical Review Letters, 104 (15). p. 151802. ISSN 0031-9007

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Abstract

Charged-lepton flavor-violating processes are unobservable in the standard model, but they are predicted to be enhanced in several extensions to the standard model, including supersymmetry and models with leptoquarks or compositeness. We present a search for such processes in a sample of 99×106Υ(2S) decays and 117×106Υ(3S) decays collected with the BABAR detector. We place upper limits on the branching fractions B(Υ(nS)→e±τ∓) and B(Υ(nS)→μ±τ∓) (n=2,3) at the 10-6 level and use these results to place lower limits of order 1 TeV on the mass scale of charged-lepton flavor-violating effective operators.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
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Depositing User: Sharon Beastall
Date Deposited: 07 Jul 2011 12:54
Last Modified: 07 Jul 2011 12:54
URI: http://eprints.hud.ac.uk/id/eprint/10922

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