Search for charged excited leptons in e+e- collisions at √s = 183-209 GeV

G. Abbiendi*, C. Ainsley, P. F. Åkesson, G. Alexander, J. Allison, P. Amaral, G. Anagnostou, K. J. Anderson, S. Arcelli, S. Asai, D. Axen, G. Azuelos, I. Bailey, E. Barberio, R. J. Barlow, R. J. Batley, P. Bechtle, T. Behnke, K. W. Bell, P. J. BellG. Bella, A. Bellerive, G. Benelli, S. Bethke, O. Biebel, I. J. Bloodworth, O. Boeriu, P. Bock, D. Bonacorsi, M. Boutemeur, S. Braibant, L. Brigliadori, R. M. Brown, K. Buesser, H. J. Burckhart, J. Cammin, S. Campana, R. K. Carnegie, B. Caron, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, I. Cohen, A. Csilling, M. Cuffiani, S. Dado, G. M. Dallavalle, S. Dallison, A. De Roeck, E. A. De Wolf, K. Desch, M. Donkers, J. Dubbert, E. Duchovni, G. Duckeck, I. P. Duerdoth, E. Elfgren, E. Etzion, F. Fabbri, L. Feld, P. Ferrari, F. Fiedler, I. Fleck, M. Ford, A. Frey, A. Fürtjes, P. Gagnon, J. W. Gary, G. Gaycken, C. Geich-Gimbel, G. Giacomelli, P. Giacomelli, M. Giunta, J. Goldberg, E. Gross, J. Grunhaus, M. Gruwé, P. O. Günther, A. Gupta, C. Hajdu, M. Hamann, G. G. Hanson, K. Harder, A. Harel, M. Harin-Dirac, M. Hauschild, J. Hauschildt, C. M. Hawkes, R. Hawkings, R. J. Hemingway, C. Hensel, G. Herten

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


A search for charged excited leptons decaying into a lepton and a photon has been performed using approximately 680 pb-1 of e+e- collision data collected by the OPAL detector at LEP at centre-of-mass energies between 183 and 209 GeV. No evidence for their existence was found. Upper limits on the product of the cross-section and the branching fraction are inferred. Using results from the search for singly produced excited leptons, upper limits on the ratio of the excited lepton coupling constant to the compositeness scale are calculated. From pair production searches, 95% confidence level lower limits on the masses of excited electrons, muons and taus are determined to be 103.2 GeV.

Original languageEnglish
Pages (from-to)57-72
Number of pages16
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 19 Sep 2002


FundersFunder number
German–Israeli Bi-national Science Foundation
Hungarian Foundation for Scientific ResearchOTKA T-029328, T-038240
National Science Foundation
U.S. Department of Energy
Natural Sciences and Engineering Research Council of Canada
National Research Council Canada
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Bundesministerium für Bildung und Forschung
Fonds Wetenschappelijk Onderzoek
Israel Academy of Sciences and Humanities
Israel Science Foundation


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