Search for lepton flavor number violating Z0 decays

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1997) Zeitschrift für Physik. C, Particles and fields — Vol. 73, n° 2, p. 243-251 (1997)

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Abstract
search for lepton flavour number violating Z0 decays in the channels Z0 --> µt, Z0 --> et , Z0 --> eµ, using the DELPHI detector with data collected during the 1991–94 LEP runs, is described. No signal was found. Upper limits at 95% confidence level for the respective branching fractions of 1.2 x 10−5, 2.2 x 10−5, and 0.25 x 10−5, were obtained.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1997). Search for lepton flavor number violating Z0 decays. Zeitschrift für Physik. C, Particles and fields, 73(2), 243-251. https://doi.org/10.1007/s002880050313 (Original work published 1997)