Searches for Lepton Flavor Violation in the Decays tau[superscript ±]-->e[superscript ±]gamma and tau[superscript ±]-->mu[superscript ±]gamma

• Main Authors: Cowan, Ray Franklin (Contributor), Dujmic, Denis (Contributor), Fisher, Peter H. (Contributor), Henderson, Shawn Wesley (Contributor), Sciolla, Gabriella (Contributor), Spitznagel, Michael (Contributor), Yamamoto, Richard K. (Contributor), Zhao, Min Liang (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-07-14T16:23:18Z.
• Subjects: Article
• Online Access: Get fulltext

Searches for lepton-flavor-violating decays of a τ lepton to a lighter mass lepton and a photon have been performed with the entire data set of (963±7)×10[superscript 6] τ decays collected by the BABAR detector near the Υ(4S), Υ(3S) and Υ(2S) resonances. The searches yield no evidence of signals and we set upper limits on the branching fractions of B(τ[superscript ±]→e[superscript ±]γ)<3.3×10[superscript -8] and B(τ[superscript ±]→μ[superscript ±]γ)<4.4×10[superscript -8] at 90% confidence level.
United States. Dept. of Energy
National Science Foundation
Natural Sciences and Engineering Research Council of Canada
Institut National de Physique Nucléaire and de Physique des Particules
Bundesministerium für Bildung und Forschung, Germany
Deutsche Forschungsgemeinschaft
Istituto Nazionale di Fisica Nucleare of Italy
FOM of the Netherlands
Norges forskningsråd
MES (Russia)
MEC (Spain)
Science and Technology Facilities Council, United Kingdom