Search for decays ofB0mesons intoe+e−,μ+μ−ande±μ∓final states

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29 February 2008

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

Vol. 77 (3) , 032007
https://doi.org/10.1103/physrevd.77.032007

Abstract

We present a search for the decays

B^{0} \to e^{+} e^{-}

,

B^{0} \to μ^{+} μ^{-}

, and

B^{0} \to e^{\pm} μ^{\mp}

using data collected with the BABAR detector at the PEP-II

e^{+} e^{-}

collider at SLAC. Using a data set corresponding to

384 \times 10^{6}

B \bar{B}

pairs, we do not find evidence of any of the three decay modes. We obtain upper limit on the branching fractions, at 90% confidence level, of

B (B^{0} \to e^{+} e^{-}) < 11.3 \times 10^{- 8}

,

B (B^{0} \to μ^{+} μ^{-}) < 5.2 \times 10^{- 8}

, and

B (B^{0} \to e^{\pm} μ^{\mp}) < 9.2 \times 10^{- 8}

.

Keywords

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Version 1, 2007-12-10, ArXiv

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