Search for the decay B{sup +}{yields}{tau}{sup +}{nu}{sub {tau}}

Journal Article · Wed Mar 01 04:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.057101· OSTI ID:20776908

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A; Pappagallo, M; Pompili, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I ^[5]

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1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
2. IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)

We search for the rare leptonic decay B{sup +}{yields}{tau}{sup +}{nu}{sub {tau}} in a sample of 232x10{sup 6} BB pairs collected with the BABAR detector at the SLAC PEP-II B-Factory. Signal events are selected by examining the properties of the B meson recoiling against the semileptonic decay B{sup -}{yields}D*{sup 0}l{sup -}{nu}{sub l}. We find no evidence for a signal and set an upper limit on the branching fraction of B(B{sup +}{yields}{tau}{sup +}{nu}{sub {tau}})<2.8x10{sup -4} at the 90% confidence level. We combine this result with a previous, statistically independent BABAR search for B{sup +}{yields}{tau}{sup +}{nu}{sub {tau}} to give an upper limit of B(B{sup +}{yields}{tau}{sup +}{nu}{sub {tau}})<2.6x10{sup -4} at the 90% confidence level.

• OSTI ID: 20776908
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 73; 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
D*-2010 MESONS
LEPTONIC DECAY
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
SEMILEPTONIC DECAY
TAU NEUTRINOS