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.
http://hal.in2p3.fr/in2p3-00003448
Contributeur : Sylvie Flores
<>
Soumis le : lundi 23 novembre 1998 - 15:49:49
Dernière modification le : mardi 19 novembre 2019 - 02:37:48
Archivage à long terme le : vendredi 29 mai 2015 - 16:10:43
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⟩
