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Title: Search for Charged Lepton Flavor Violation in Narrow Υ Decays
Author: Garra Ticó, Jordi
Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 16-Apr-2010
Publisher: American Physical Society
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 × 10 6 Υ ( 2 S ) decays and 117 × 10 6 Υ ( 3 S ) decays collected with the BABAR detector. We place upper limits on the branching fractions B ( Υ ( n S ) → e ± τ ∓ ) and B ( Υ ( n S ) → 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.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2010, vol. 104, num. 15, p. 151802
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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