Lees, J. P. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Hitlin, D. G. and Ongmongkolkul, P. and Porter, F. C. and Rakitin, A. Y. (2010) Search for Charged Lepton Flavor Violation in Narrow Y Decays. Physical Review Letters, 104 (15). Art. No. 151802. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:20100608-091646489
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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 99×10^6Υ(2S) decays and 117×10^6Υ(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
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Additional Information: | © 2010 The American Physical Society. Received 20 January 2010; published 16 April 2010. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (U.S.A.), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation. | ||||||||||||||||||||||||||||||||||
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Issue or Number: | 15 | ||||||||||||||||||||||||||||||||||
Classification Code: | PACS: 13.20.Gd, 11.30.Hv, 14.40.Nd | ||||||||||||||||||||||||||||||||||
Record Number: | CaltechAUTHORS:20100608-091646489 | ||||||||||||||||||||||||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20100608-091646489 | ||||||||||||||||||||||||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||||
ID Code: | 18602 | ||||||||||||||||||||||||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||||
Deposited By: | Ruth Sustaita | ||||||||||||||||||||||||||||||||||
Deposited On: | 08 Jun 2010 17:03 | ||||||||||||||||||||||||||||||||||
Last Modified: | 09 Mar 2020 13:18 |
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