Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-07-20
Phys.Rev.D62:091102,2000
Physics
High Energy Physics
High Energy Physics - Experiment
10 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS
Scientific paper
10.1103/PhysRevD.62.091102
We search for the decays of the $B^0$ meson into $e^+e^-$, $\mu^+\mu^-$ $e^{\pm}\mu^{\mp}$ pairs 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 corresponding branching fractions are established: $<8.3\times 10^{-7}$, $<6.1\times 10^{-7}$, $< 15\times 10^{-7}$ at 90% confidence level. A new lower limit on the Pati-Salam leptoquark mass $M_{LQ}>27$ TeV is established at 90% confidence level.
Bergfeld T.
CLEO Collaboration
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