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Search for B+→ℓ+νℓrecoiling against B-→ℓ-ν̄X

Abstract:

We present a search for the decay B+→ℓ +νℓ(ℓ=τ,μ,ore) in (458.9±5.1)×106 BB̄ 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 -ν̄X. 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)×103MeV2. We fin...

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Publisher copy:
10.1103/PhysRevD.81.051101

Authors


Karyotakis, Y More by this author
Poireau, V More by this author
Prencipe, E More by this author
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Journal:
Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume:
81
Issue:
5
Publication date:
2010-03-30
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
URN:
uuid:40e5b983-b67f-41ed-b3ef-b8770bb3e03a
Source identifiers:
211425
Local pid:
pubs:211425
Language:
English

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