Search for $B \to ℓ {\bar{ν}}_{ℓ}$

Publisher Website

31 July 1995

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 75 (5) , 785-789
https://doi.org/10.1103/physrevlett.75.785

Abstract

We search for the decays

B^{-} \to ℓ^{-} {\bar{ν}}_{ℓ}

in a sample of

2.2 \times 10^{6}

charged

B

decays using the CLEO detector. We see no evidence for a signal in any channel and set upper limits on the branching fractions of

B (B^{-} \to τ^{-} {\bar{ν}}_{τ}) < 2.2 \times 10^{- 3}

,

B (B^{-} \to μ^{-} {\bar{ν}}_{μ}) < 2.1 \times 10^{- 5}

, and

B (B^{-} \to e^{-} {\bar{ν}}_{e}) < 1.5 \times 10^{- 5}

at the 90% confidence level.

Keywords

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