A Caltech Library Service

Search for Charged Lepton Flavor Violation in Narrow Y Decays

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.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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

Item Type:Article
Related URLs:
URLURL TypeDescription
Cheng, C. H.0000-0002-8382-0447
Hitlin, D. G.0000-0003-4028-6982
Porter, F. C.0000-0003-1948-8889
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.
Funding AgencyGrant Number
Department of EnergyUNSPECIFIED
Natural Sciences and Engineering Research Council (Canada)UNSPECIFIED
Commissariat à l'Énergie Atomique (French Atomic Energy Commission)UNSPECIFIED
Centre National de la Recherche Scientifique (National Center for Scientific Research, France)UNSPECIFIED
Institut National de Physique Nucléaire et Physique des Particules (France)UNSPECIFIED
Bundesministerium für Bildung und Forschung (German: Federal Ministry of Education and Research; Bonn, Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (German Research Council)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare, ItalyUNSPECIFIED
Foundation for Fundamental Research on Matter (The Netherlands)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Ministerio de Educación y Ciencia (Spain: Ministry for Education and Science)UNSPECIFIED
Science and Technology Facilities Council (UK)UNSPECIFIED
Marie Curie EIF (European Union)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Issue or Number:15
Classification Code:PACS: 13.20.Gd, 11.30.Hv, 14.40.Nd
Record Number:CaltechAUTHORS:20100608-091646489
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18602
Deposited By: Ruth Sustaita
Deposited On:08 Jun 2010 17:03
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page