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http://hdl.handle.net/2445/135278
Title: | Search for Charged Lepton Flavor Violation in Narrow Υ Decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
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: https://doi.org/10.1103/PhysRevLett.104.151802 |
It is part of: | Physical Review Letters, 2010, vol. 104, num. 15, p. 151802 |
URI: | http://hdl.handle.net/2445/135278 |
Related resource: | https://doi.org/10.1103/PhysRevLett.104.151802 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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