Search for lepton flavour violation in e⁺e⁻ collisions at √s = 189-209 GeV

G Abbiendi, Georgios Anagnostou, Paul Bell, Ian Bloodworth, David Charlton, Christopher Hawkes, Roger Homer, Predrag Jovanovic, Thomas McMahon, Stephen O'Neale, Miriam Watson, Peter Watkins, Alan Watson, Nigel Watson, John Wilson

Research output: Contribution to journalArticle

20 Citations (Scopus)


We search for lepton flavour violating events (e mu, e tau and mu tau) that could be directly produced in e(+) e(-) annihilations, using the full available data sample collected with the OPAL detector at centre-of-mass energies between 189 GeV and 209 GeV. In general, the Standard Model expectations describe the data well for all the channels and at each roots. A single ett event is observed where according to our Monte Carlo simulations only 0.019 events are expected from Standard Model processes. We obtain the first limits on the cross-sections sigma (e(+)e(-) --> e mu, e tau and mu tau) as a function of roots at LEP2 energies. (C) 2001 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)23-32
Number of pages10
JournalPhysics Letters B
Issue number1-2
Publication statusPublished - 25 Oct 2001


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