Search for flavor-changing neutral current and lepton-flavor violating decays of D0->l+l-

Details Search for flavor-changing neutral current and lepton-flavor violating decays of D0->l+l- Search for flavor-changing neutral current and lepton-flavor violating decays of D0->l+l-

2004-08-10

arxiv.org/abs/hep-ex/0408023v2

Phys.Rev.Lett.93:191801,2004

Physics

High Energy Physics

High Energy Physics - Experiment

Minor changes of the text and reference for the publication

Scientific paper

10.1103/PhysRevLett.93.191801

We report on a search for the flavor-changing neutral current decays $\Dz\to e^+e^-$ and $\Dz\to\mu^+\mu^-$, and the lepton-flavor violating decay $\Dz\to e^\pm\mu^\mp$. The measurement is based on $122 {fb}^{-1}$ of data collected by the \babar detector at the PEP-II asymmetric $e^+e^-$ collider. No evidence is found for any of the decays. The upper limits on the branching fractions, at the 90 % confidence level, are $1.2\times 10^{-6}$ for $\Dz\to e^+e^-$, $1.3\times 10^{-6}$ for $\Dz\to\mu^+\mu^-$, and $8.1\times 10^{-7}$ for $\Dz\to e^\pm\mu^\mp$.

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