T. E. Browder, CLEO Collaboration
Published 2000-07-27Version 1
We report results of a search for $B\to\tau\nu$ in a sample of 9.7 million charged $B$ meson decays. The search uses both $\pi\nu$ and $\ell\nu\bar\nu$ decay modes of the $\tau$, and demands exclusive reconstruction of the companion $\bar B$ decay to suppress background. We set an upper limit on the branching fraction ${\cal B}(B\to \tau\nu) < 8.4\times 10^{-4}$ at 90% confidence level. With slight modification to the analysis we also establish ${\cal B}(B^\pm\to K^\pm\nu\bar\nu) < 2.4\times 10^{-4}$ at 90% confidence level.
Comments: 10 ages postscript, also available through http://w4.lns.cornell.edu/public/CLNS
Journal: Phys.Rev.Lett.86:2950-2954,2001
Search for B^0 -> l^+ l^- at Belle
Structure Functions in the Decay $τ^{\mp}\to τ^{\mp}π^{0}π^{0}ν_τ$
Search for Decays of B^{0} Mesons into Pairs of Leptons: B{0} -> e^{+}e^{-}, B^{0} -> μ^{+}μ^{-} and B^{0} -> e^{\pm}μ^{\mp}
