TY  - JOUR
AU  - BABAR Collaboration (Aubert, B. et al
AU  - Azzolini, V.
AU  - Lopez-March, N.
AU  - Martinez-Vidal, F.
AU  - Milanes, D. A.
AU  - Oyanguren, A.
PY  - 2010
DA  - 2010//
TI  - Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 051101
EP  - 9pp
VL  - 81
IS  - 5
PB  - Amer Physical Soc
AB  - We present a search for the decay B+ -> l(+)nu(l) (l = tau, mu, or e) in (458.9 +/- 5.1) x 10(6) B (B) over 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- -> D(0)l(-)(nu) over barX. Using the method of Feldman and Cousins, we obtain B(B+ -> tau(+)nu(tau)) = (1.7 +/- 0.8 +/- 0.2) x 10(-4), which excludes zero at 2.3 sigma. We interpret the central value in the context of the standard model and find the B meson decay constant to be f(B)(2) = (62 +/- 31) x 10(3) MeV2. We find no evidence for B+ -> e(+)nu(e) and B+ -> mu(+)nu(mu) and set upper limits at the 90% C. L. B(B+ -> e(+)nu(e)) < 0.8 x 10(-5) and B(B+ -> mu(+)nu(mu)) < 1.1 x 10(-5).
SN  - 1550-7998
UR  - http://fr.arxiv.org/abs/0912.2453
UR  - https://doi.org/10.1103/PhysRevD.81.051101
DO  - 10.1103/PhysRevD.81.051101
LA  - English
N1  - ISI:000276194200001
ID  - BABARCollaborationAubert_etal2010
ER  -