Search for B+→ℓ+νℓ recoiling against B−→D0ℓ−ν[bar]X
We present a search for the decay B+→ℓ+νℓ(ℓ=τ,μ, or e) in (458.9±5.1)×106 BB[bar] 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−¯νX. Using the method of Feldman and Cousins, we obta...
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| Main Authors: | , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
30 March 2010
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Volume: 81, Issue: 5, Pages: 1-9 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.81.051101 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.81.051101 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.81.051101 
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| Author Notes: | BABAR Collaboration* |
| Summary: | We present a search for the decay B+→ℓ+νℓ(ℓ=τ,μ, or e) in (458.9±5.1)×106 BB[bar] 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−¯νX. 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 f2B=(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. |
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| Item Description: | *BABAR Collaboration: B. Aubert, J. Marks, S. Schenk, U. Uwer [und 485 weitere Personen] Im Titel steht der zweite Buchstabe v mit einem Oberstrich Im Titel sind die Zeichen + und - sowie die Zahl 0 hochgestellt Gesehen am 28.11.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.81.051101 |