Search for decays ofB0mesons into pairs of leptons:B0→e+e−,B0→μ+μ−,andB0→e±μ∓

Publisher Website

2 October 2000

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

Vol. 62 (9) , 091102
https://doi.org/10.1103/physrevd.62.091102

Abstract

We search for the decay of the

B^{0}

meson into a pair of leptons in the suppressed channels

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

B^{0} \to μ^{+} μ^{-}

and in the lepton number violating channel

B^{0} \to e^{\pm} μ^{\mp}

in a sample of

9.7 \times 10^{6} B \bar{B}

pairs recorded by CLEO detector. No signal is found, and the following upper limits on the branching fractions are established:

B {(B}^{0} \to e^{+} e^{-}) < 8.3 \times 10^{- 7},

B {(B}^{0} \to μ^{+} μ^{-}) < 6.1 \times 10^{- 7},

B {(B}^{0} \to e^{\pm} μ^{\mp}) < 15 \times 10^{- 7}

at 90% confidence level. A new lower limit on the Pati-Salam leptoquark mass

M_{LQ} > 27 TeV

is established at 90% confidence level.

Keywords

CLEO

All Related Versions

Version 1, 2000-07-20, ArXiv

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