Search for lepton flavour violation in e(+)e(-) collisions at root s=189-209 GeV

Authors
Abbiendi, G Ainsley, C Akesson, PF Alexander, G Allison, J Anagnostou, G Anderson, KJ Arcelli, S Asai, S Axen, D Azuelos, G Bailey, I Barberio, E Barlow, RJ Batley, RJ Behnke, T Bell, KW Bell, PJ Bella, G Bellerive, A Bethke, S Biebel, O Bloodworth, IJ Boeriu, O Bock, P Bohme, J Bonacorsi, D Boutemeur, M Braibant, S Brigliadori, L Brown, RM Burckhart, HJ Cammin, J Carnegie, RK Caron, B Carter, AA Carter, JR Chang, CY Charlton, DG Clarke, PEL Clay, E Cohen, I Couchman, J Csilling, A Cuffiani, M Dado, S Dallavalle, GM Dallison, S De Roeck, A De Wolf, EA Dervan, P Desch, K Dienes, B Dixit, MS Donkers, M Dubbert, J Duchovni, E Duckeck, G Duerdoth, IP Etzion, E Fabbri, F Feld, L Ferrari, P Fiedler, F Fleck, I Ford, M Frey, A Furtjes, A Futyan, DI Gagnon, P Gary, JW Gaycken, G Geich-Gimbel, C Giacomelli, G Giacomelli, P Glenzinski, D Goldberg, J Graham, K Gross, E Grunhaus, J Gruwe, M Gunther, PO Gupta, A Hajdu, C Hamann, M Hanson, GG Harder, K Harel, A Harin-Dirac, M Hauschild, M Hauschildt, J Hawkes, CM Hawkings, R Hemingway, RJ Hensel, C Herten, G Heuer, RD Hill, JC Hoffman, K Homer, RJ Horvath, D Hossain, KR Howard, R Huntemeyer, P Igo-Kemenes, P Ishii, K Jawahery, A Jeremie, H Jones, CR Jovanovic, P Junk, TR Kanaya, N Kanzaki, J Karapetian, G Karlen, D Kartvelishvili, V Kawagoe, K Kawamoto, T Keeler, RK Kellogg, RG Kennedy, BW Kim, DH Klein, K Klier, A Kluth, S Kobayashi, T Kobel, M Kokott, TP Komamiya, S Kowalewski, RV Kramer, T Kress, T Krieger, P von Krogh, J Krop, D Kuhl, T Kupper, M Kyberd, P Lafferty, GD Landsman, H Lanske, D Lawson, I Layter, JG Leins, A Lellouch, D Letts, J Levinson, L Lillich, J Littlewood, C Lloyd, SL Loebinger, FK Long, GD Losty, MJ Lu, J Ludwig, J Macchiolo, A Macpherson, A Mader, W Marcellini, S Marchant, TE Martin, AJ Martin, JP Martinez, G Masetti, G Mashimo, T Mattig, P McDonald, WJ McKenna, J McMahon, TJ McPherson, RA Meijers, F Mendez-Lorenzo, P Menges, W Merritt, FS Mes, H Michelini, A Mihara, S Mikenberg, G Miller, DJ Moed, S Mohr, W Mori, T Mutter, A Nagai, K Nakamura, I Neal, HA Nisius, R O'Neale, SW Oh, A Okpara, A Oreglia, MJ Orito, S Pahl, C Pasztor, G Pater, JR Patrick, GN Pilcher, JE Pinfold, J Plane, DE Poli, B Polok, J Pooth, O Quadt, A Rabbertz, K Rembser, C Renkel, P Rick, H Rodning, N Roney, JM Rosati, S Roscoe, K Rozen, Y Runge, K Rust, DR Sachs, K Saeki, T Sahr, O Sarkisyan, EKG Sbarra, C Schaile, AD Schaile, O Scharff-Hansen, P Schroder, M Schumacher, M Schwick, C Scott, WG Seuster, R Shears, TG Shen, BC Shepherd-Themistocleous, CH Sherwood, P Skuja, A Smith, AM Snow, GA Sobie, R Soldner-Rembold, S Spagnolo, S Spano, F Sproston, M Stahl, A Stephens, K Strom, D Strohmer, R Stumpf, L Surrow, B Tarem, S Tasevsky, M Taylor, RJ Teuscher, R Thomas, J Thomson, MA Torrence, E Toya, D Trefzger, T Tricoli, A Trigger, I Trocsanyi, Z Tsur, E Turner-Watson, MF Ueda, I Ujvari, B Vachon, B Vollmer, CF Vannerem, P Verzocchi, M Voss, H Vossebeld, J Waller, D Ward, CP Ward, DR Watkins, PM Watson, AT Watson, NK Wells, PS Wengler, T Wermes, N Wetterling, D Wilson, GW Wilson, NK Wyatt, TR Yamashita, S Zacek, V Zer-Zion, D
Citation
G. Abbiendi et al., Search for lepton flavour violation in e(+)e(-) collisions at root s=189-209 GeV, PHYS LETT B, 519(1-2), 2001, pp. 23-32
Citations number
38
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
519
Issue
1-2
Year of publication
2001
Pages
23 - 32
Database
ISI
SICI code
0370-2693(20011025)519:1-2<23:SFLFVI>2.0.ZU;2-T
Abstract
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 avai lable data sample collected with the OPAL detector at centre-of-mass energi es 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 et t event is observed where according to our Monte Carlo simulations only 0.0 19 events are expected from Standard Model processes. We obtain the first l imits 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 ri ghts reserved.