TY - JOUR
T1 - Searches for the decays B0 -> l+ tau- and B+ -> l+ nu (l=e,mu) using hadronic tag reconstruction
AU - Aubert, B.
AU - Playfer, Stephen
AU - The BaBar Collaboration
AU - Clark, Philip
N1 - 8 pages, 2 postscript figures, submitted to PRD-RC
PY - 2008/1/4
Y1 - 2008/1/4
N2 - We present searches for the leptonic decays B+ -> l+ nu and the lepton flavor violating decays B0 -> l+ tau-, where l=e,mu, with data collected by the BaBar experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying Bbar in Upsilon(4S)->BBbar events, and look for a monoenergetic lepton from the signal B decay. The signal yield is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378 million BBbar pairs (342fb-1), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of B(B+ -> e+ nu) mu+ nu) e+ tau-) mu+ tau-)
AB - We present searches for the leptonic decays B+ -> l+ nu and the lepton flavor violating decays B0 -> l+ tau-, where l=e,mu, with data collected by the BaBar experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying Bbar in Upsilon(4S)->BBbar events, and look for a monoenergetic lepton from the signal B decay. The signal yield is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378 million BBbar pairs (342fb-1), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of B(B+ -> e+ nu) mu+ nu) e+ tau-) mu+ tau-)
KW - hep-ex
UR - http://www.scopus.com/inward/record.url?scp=44349172904&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.77.091104
DO - 10.1103/PhysRevD.77.091104
M3 - Article
JO - Physical Review D, particles, fields, gravitation, and cosmology
JF - Physical Review D, particles, fields, gravitation, and cosmology
ER -