Search for the rare leptonic decays B+-->l+ nu l (l=e,mu)

• Main Authors: Zhao, M. (Contributor), Yamamoto, R. K. (Contributor), Spitznagel, M. (Contributor), Sciolla, Gabriella (Contributor), Henderson, Shawn Wesley (Contributor), Dujmic, Denis (Contributor), Cowan, Ray Franklin (Contributor), Fisher, Peter H. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor), Fisher, P. H. (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-06-02T16:00:57Z.
• Subjects: Article
• Online Access: Get fulltext

We have performed a search for the rare leptonic decays B+-->ℓ+nu ℓ(l=e,mu), using data collected at the Υ(4S) resonance by the BABAR detector at the PEP-II storage ring. In a sample of 468×106 BB[over-bar] pairs we find no evidence for a signal and set an upper limit on the branching fractions B(B+-->mu+nu mu)<1.0×10[superscript -6] and B(B+-->e+nu e)<1.9×10[superscript -6] at the 90% confidence level, using a Bayesian approach.
Science and Technology Facilities Council, United Kingdom
MEC (Spain)
Ministry of Education and Science of the Russian Federation
Norges forskningsråd
FOM of the Netherlands
Istituto Nazionale di Fisica Nucleare of Italy
Deutsche Forschungsgemeinschaft
Bundesministerium für Bildung und Forschung, Germany
Institut National de Physique Nucleaire et Physique des Particules/CNRS
Commissariat à l'Energie Atomique
Natural Sciences and Engineering Research Council of Canada
National Science Foundation
United States Department of Energy