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| Release | : 1988 |
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A search for the lepton-flavor violating decay K.--> pi.mu.+e− has been performed. Measurements have also been made of the branching ratio and decay particle distributions for the decay K+.--> pi.+e−. A description of the measurement technique, and preliminary results are presented. 6 refs., 5 figs.
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| Release | : 1988 |
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The progress of AGS Experiment 777, a search for K .-->. .pi.mu.+e− is described. Results on the decay K+ .-->. .pi.+A°, where A° is a weakly interacting neutral particle that decays into e+e− and preliminary results on the direct decay K+ .-->. .pi.+e+e− are presented as well as new limits on .pi.° .-->. .mu.+e−. 12 refs., 5 figs.
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| Total Pages | : 16 |
| Release | : 2012 |
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We present a search for the lepton flavor violating decay modes B{sup ±} → h{sup ±} [tau]l (h = K, [pi]; l = e, [mu]) using the BABAR data sample, which corresponds to 472 million B{bar B} pairs. The search uses events where one B meson is fully reconstructed in one of several hadronic final states. Using the momenta of the reconstructed B, h, and l candidates, we are able to fully determine the [tau] four-momentum. The resulting [tau] candidate mass is our main discriminant against combinatorial background. We see no evidence for B{sup ±} → h{sup ±} [tau]l decays and set a 90% confidence level upper limit on each branching fraction at the level of a few times 10−5.
| Author | : Drasko Jovanovic |
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| Total Pages | : 138 |
| Release | : 1987 |
| Genre | : Nuclear physics |
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