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Search for B^{+}→ℓ^{+}ν_{ℓ} recoiling against B^{-}→D^{0}ℓ^{-}ν[over ¯]X
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(2010) Search for B^{+}→ℓ^{+}ν_{ℓ} recoiling against B^{-}→D^{0}ℓ^{-}ν[over ¯]X. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.81 (No.5). article no. 051101(R). doi:10.1103/PhysRevD.81.051101 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevD.81.051101
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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | 2010 | ||||
| Dates: |
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| Volume: | Vol.81 | ||||
| Number: | No.5 | ||||
| Number of Pages: | 9 | ||||
| Page Range: | article no. 051101(R) | ||||
| DOI: | 10.1103/PhysRevD.81.051101 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published |
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