Please use this identifier to cite or link to this item:
Título : Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
Autor : Babar Collaboration, Azzolini, Virginia, López-March, Neus, Martínez-Vidal, Fernando, Milanés, Diego A., Oyanguren, Arantza, Aubert, B., Lees, J. P.
Fecha de publicación : 1-Mar-2010
Editor: American Physical Society
Resumen: 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).
Versión del editor: 10.1103/PhysRevD.81.051101
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.81.051101
Citación : Physical Review - Section D - Particles and Fields 81 (5): 051101 (2010)
Appears in Collections:(IFIC) Artículos

Files in This Item:
File Description SizeFormat 
Recoiling Against.pdf212,75 kBAdobe PDFView/Open
Show full item record

Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.