Search for B{sup +{yields}}l{sup +{nu}}{sub l} recoiling against B{sup -{yields}}D{sup 0}l{sup -{nu}}X

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.051101· OSTI ID:21409806

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; Hooberman, B; Kerth, L T; Kolomensky, Yu 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 present a search for the decay B{sup +{yields}}l{sup +{nu}}{sub l}(l={tau},{mu}, or e) in (458.9{+-}5.1)x10{sup 6} BB pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B{sup +}B{sup -} events where one B-meson is reconstructed as B{sup -{yields}}D{sup 0}l{sup -{nu}}X. Using the method of Feldman and Cousins, we obtain B(B{sup +{yields}{tau}+{nu}}{sub {tau}})=(1.7{+-}0.8{+-}0.2)x10{sup -4}, which excludes zero at 2.3{sigma}. We interpret the central value in the context of the standard model and find the B meson decay constant to be f{sub B}{sup 2}=(62{+-}31)x10{sup 3} MeV{sup 2}. We find no evidence for B{sup +{yields}}e{sup +{nu}}{sub e} and B{sup +{yields}{mu}+{nu}}{sub {mu}}and set upper limits at the 90% C.L. B(B{sup +{yields}}e{sup +{nu}}{sub e})<0.8x10{sup -5} and B(B{sup +{yields}{mu}+{nu}}{sub {mu}})<1.1x10{sup -5}.

• OSTI ID: 21409806
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevD.81.051101; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B PLUS MESONS
D MESONS
ELECTRON NEUTRINOS
ELECTRONS
MESON FACTORIES
MUON NEUTRINOS
MUONS
PARTICLE DECAY
PEP STORAGE RINGS
STANDARD MODEL
TAU NEUTRINOS
TAU PARTICLES
ACCELERATORS
B MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
HEAVY LEPTONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
NEUTRINOS
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
STORAGE RINGS
UNIFIED GAUGE MODELS