Search for the rare leptonic decays B{sup +}{yields}l{sup +}{nu}{sub l} (l=e,{mu})

Journal Article · Fri May 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.091101· OSTI ID:21308386

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We have performed a search for the rare leptonic decays B{sup +}{yields}l{sup +}{nu}{sub l}(l=e,{mu}), using data collected at the {upsilon}(4S) resonance by the BABAR detector at the PEP-II storage ring. In a sample of 468x10{sup 6} BB pairs we find no evidence for a signal and set an upper limit on the branching fractions B(B{sup +}{yields}{mu}{sup +}{nu}{sub {mu}})<1.0x10{sup -6} and B(B{sup +}{yields}e{sup +}{nu}{sub e})<1.9x10{sup -6} at the 90% confidence level, using a Bayesian approach.

• OSTI ID: 21308386
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B PLUS MESONS
BRANCHING RATIO
ELECTRON NEUTRINOS
LEPTONIC DECAY
MUON NEUTRINOS
MUONS PLUS
POSITRONS
RESONANCE
STORAGE RINGS