Search for B+-->[script l]+ν[script l] recoiling against B -->D0[script l]- [v over-bar]X
Name
Aubert-2010-Search for B+ -_ l(+.pdf
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Checksum (MD5)
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Author(s)
Dujmic, Denis
Henderson, Shawn Wesley
Sciolla, Gabriella
Zhao, M.
Cowan, Ray F
Fisher, Peter H
Spitznagel, Michael A
Yamamoto, R. K.
Alternative Title
Search for B+→ℓ+νℓ recoiling against B-→D0ℓ-ν̅ X
Date Issued
March 2010
Journal
Physical review D
Publisher
American Physical Society
Citation
B. Aubert et al. (2010). Search for B+→ℓ+νℓ recoiling against B-→D0ℓ-ν̅ X. Phys. rev. D 81: 051101/1-9. © 2010 The American Physical Society
Version
Final published version
Abstract
We present a search for the decay B+→ℓ+νℓ(ℓ=τ,μ, or e) in (458.9±5.1)×106 BB̅ pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B+B- events where one B-meson is reconstructed as B-→D0ℓ-ν̅ X. Using the method of Feldman and Cousins, we obtain B(B+→τ+ντ)=(1.7±0.8±0.2)×10-4, which excludes zero at 2.3σ. We interpret the central value in the context of the standard model and find the B meson decay constant to be fB2=(62±31)×103 MeV2. We find no evidence for B+→e+νe and B+→μ+νμ and set upper limits at the 90% C.L. B(B+→e+νe)<0.8×10-5 and B(B+→μ+νμ)<1.1×10-5.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.051101
