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DELPHI Collaboration; Ferrer Soria, Antonio; Higón Rodríguez, Emilio; Castillo Giménez, María Victoria; Martínez Vidal, Antonio; Hernández Rey, Juan José; Fuster Verdú, Juan A.; Salt Cairols, José; Lacasta Llácer, Carlos | |||
Aquest document és un/a article, creat/da en: 1997 | |||
Este documento está disponible también en : 10.1007/s002880050313 |
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A search for lepton flavour number violating $Z^0$ decays in the channels \begin{center} $Z^0\rightarrow \mu\tau$,\\ $Z^0\rightarrow e\tau$, \\ $Z^0\rightarrow e\mu$, \\ \end{center} 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 $1.2\times 10^{-5}$, $2.2\times 10^{-5}$, and $0.25\times 10^{-5}$, were obtained. | |||
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