Search for lepton-flavor-violating decays $D^{0}\rightarrow X^{0}e^{\pm}\mu^{\mp}$
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- Poireau, V.
- Tisserand, V.
- Grauges, E.
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- Huard, Z.
- Meadows, B.T.
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- Sokoloff, M.D.
- Sun, L.
- Smith, J.G.
- Wagner, S.R.
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- Finocchiaro, G.
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- de Mori, F.
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- Gamba, D.
- Lanceri, L.
- Vitale, L.
- Martinez-Vidal, F.
- Oyanguren, A.
- Albert, J.
- Beaulieu, A.
- Bernlochner, F.U.
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- Kowalewski, R.
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- Nugent, I.M.
- Roney, J.M.
- Sobie, R.J.
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- Wu, S.L.
DOIAbstract
International audienceWe present a search for seven lepton-flavor-violating neutral charm meson decays of the type D0→X0e±μ∓, where X0 represents a π0, KS0, K¯*0, ρ0, ϕ, ω, or η meson. The analysis is based on 468 fb-1 of e+e- annihilation data collected at or close to the ϒ(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. No significant signals are observed, and we establish 90% confidence level upper limits on the branching fractions in the range (5.0-22.5)×10-7. The limits are between 1 and 2 orders of magnitude more stringent than previous measurements
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