# Search for Lepton Flavour Number violating Z$^0$-Decays

Abstract : 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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Journal articles
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Cited literature [7 references]

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Contributor : Sylvie Flores <>
Submitted on : Monday, November 23, 1998 - 3:49:49 PM
Last modification on : Wednesday, March 31, 2021 - 10:50:02 PM
Long-term archiving on: : Friday, May 29, 2015 - 4:10:43 PM

### Identifiers

• HAL Id : in2p3-00003448, version 1

### Citation

P. Abreu, W. Adam, T. Adye, I. Ajinenko, G D. Alekseev, et al.. Search for Lepton Flavour Number violating Z$^0$-Decays. Zeitschrift für Physik C Particles and Fields, Springer Verlag, 1997, 73, pp.243-251. ⟨in2p3-00003448⟩

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