Published April 16, 2010
| Published
Journal Article
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Search for Charged Lepton Flavor Violation in Narrow Y Decays
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
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.Attached Files
Published - Lees2010p9959Phys_Rev_Lett.pdf
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Additional details
- Eprint ID
- 18602
- Resolver ID
- CaltechAUTHORS:20100608-091646489
- Department of Energy
- NSF
- Natural Sciences and Engineering Research Council (Canada)
- Commissariat à l'Énergie Atomique (French Atomic Energy Commission)
- Centre National de la Recherche Scientifique (National Center for Scientific Research, France)
- Institut National de Physique Nucléaire et Physique des Particules (France)
- Bundesministerium für Bildung und Forschung (German: Federal Ministry of Education and Research; Bonn, Germany)
- Deutsche Forschungsgemeinschaft (German Research Council)
- Istituto Nazionale di Fisica Nucleare, Italy
- Foundation for Fundamental Research on Matter (The Netherlands)
- Research Council of Norway
- Ministry of Education and Science of the Russian Federation
- Ministerio de Educación y Ciencia (Spain: Ministry for Education and Science)
- Science and Technology Facilities Council (UK)
- Marie Curie EIF (European Union)
- A. P. Sloan Foundation
- Created
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2010-06-08Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field