|
Search for Unstable Heavy and Excited Leptons at LEP2 (2000) |
- Abbiendi, G,
- Ackerstaff, K,
- Åkesson, P F,
- Alexander, Gideon,
- Allison, J,
- Anderson, K J,
- Arcelli, S,
- Asai, S,
- Ashby, S F,
- Axen, D A,
- Azuelos, Georges,
- Bailey, I,
- Ball, A H,
- Barberio, E,
- Barlow, R J,
- Batley, J Richard,
- Baumann, S,
- Behnke, T,
- Bell, K W,
- Bella, G,
- Bellerive, A,
- Bentvelsen, Stanislaus Cornelius Maria,
- Bethke, Siegfried,
- Betts, S,
- Biebel, O,
- Biguzzi, A,
- Bloodworth, Ian J,
- Bock, P,
- Böhme, J,
- Boeriu, O,
- Bonacorsi, D,
- Boutemeur, M,
- Braibant, S,
- Bright-Thomas, P G,
- Brigliadori, L,
- Brown, R M,
- Burckhart, Helfried J,
- Capiluppi, P,
- Carnegie, R K,
- Carter, A A,
- Carter, J R,
- Chang, C Y,
- Charlton, D G,
- Chrisman, D,
- Ciocca, C,
- Clarke, P E L,
- Clay, E,
- Cohen, I,
- Conboy, J E,
- Cooke, O C,
- Couchman, J,
- Couyoumtzelis, C,
- Coxe, R L,
- Cuffiani, M,
- Dado, S,
- Dallavalle, G M,
- Dallison, S,
- Davis, R,
- De Roeck, A,
- Dervan, P J,
- Desch, Klaus,
- Dienes, B,
- Dixit, M S,
- Donkers, M,
- Dubbert, J,
- Duchovni, E,
- Duckeck, G,
- Duerdoth, I P,
- Estabrooks, P G,
- Etzion, E,
- Fabbri, Franco Luigi,
- Fanfani, A,
- Fanti, M,
- Faust, A A,
- Feld, L,
- Ferrari, P,
- Fiedler, F,
- Fierro, M,
- Fleck, I,
- Frey, A,
- Fürtjes, A,
- Futyan, D I,
- Gagnon, P,
- Gary, J W,
- Gaycken, G,
- Geich-Gimbel, C,
- Giacomelli, G,
- Giacomelli, P,
- Gingrich, D M,
- Glenzinski, D A,
- Goldberg, J,
- Gorn, W,
- Grandi, C,
- Graham, K,
- Gross, E,
- Grunhaus, Jacob,
- Gruwé, M,
- Hajdu, C,
- Hanson, G G,
- Hansroul, M,
- Hapke, M,
- Harder, K,
- Harel, A,
- Hargrove, C K,
- Harin-Dirac, M,
- Hauschild, M,
- Hawkes, C M,
- Hawkings, R,
- Hemingway, Richard J,
- Herten, G,
- Heuer, R D,
- Hildreth, M D,
- Hill, J C,
- Hobson, P R,
- Höcker, Andreas,
- Hoffman, K,
- Homer, R James,
- Honma, A K,
- Horváth, D,
- Hossain, K R,
- Howard, R,
- Hüntemeyer, P,
- Igo-Kemenes, P,
- Imrie, D C,
- Ishii, K,
- Jacob, F R,
- Jawahery, A,
- Jeremie, H,
- Jimack, Martin Paul,
- Jones, C R,
- Jovanovic, P,
- Junk, T R,
- Kanaya, N,
- Kanzaki, J I,
- Karapetian, G V,
- Karlen, D A,
- Kartvelishvili, V G,
- Kawagoe, K,
- Kawamoto, T,
- Kayal, P I,
- Keeler, Richard K,
- Kellogg, R G,
- Kennedy, B W,
- Kim, D H,
- Klier, A,
- Kobayashi, T,
- Kobel, M,
- Kokott, T P,
- Kolrep, M,
- Komamiya, S,
- Kowalewski, R V,
- Kress, T,
- Krieger, P,
- Von Krogh, J,
- Kühl, T,
- Kupper, M,
- Kyberd, P,
- Lafferty, G D,
- Landsman, Hagar Yaël,
- Lanske, D,
- Lauber, J,
- Lawson, I,
- Layter, J G,
- Lellouch, Daniel,
- Letts, J,
- Levinson, L,
- Liebisch, R,
- Lillich, J,
- List, B,
- Littlewood, C,
- Lloyd, A W,
- Lloyd, S L,
- Loebinger, F K,
- Long, G D,
- Losty, Michael J,
- Lü, J,
- Ludwig, J,
- Macchiolo, A,
- MacPherson, A L,
- Mader, W F,
- Mannelli, M,
- Marcellini, S,
- Marchant, T E,
- Martin, A J,
- Martin, J P,
- Martínez, G,
- Mashimo, T,
- Mättig, P,
- McDonald, W J,
- McKenna, J A,
- McKigney, E A,
- McMahon, T J,
- McPherson, R A,
- Meijers, F,
- Méndez-Lorenzo, P,
- Merritt, F S,
- Mes, H,
- Meyer, I,
- Michelini, Aldo,
- Mihara, S,
- Mikenberg, G,
- Miller, D J,
- Mohr, W,
- Montanari, A,
- Mori, T,
- Nagai, K,
- Nakamura, I,
- Neal, H A,
- Nisius, R,
- O'Neale, S W,
- Oakham, F G,
- Odorici, F,
- Ögren, H O,
- Okpara, A N,
- Oreglia, M J,
- Orito, S,
- Pásztor, G,
- Pater, J R,
- Patrick, G N,
- Patt, J,
- Pérez-Ochoa, R,
- Petzold, S,
- Pfeifenschneider, P,
- Pilcher, J E,
- Pinfold, James L,
- Plane, D E,
- Poli, B,
- Polok, J,
- Przybycien, M B,
- Quadt, A,
- Rembser, C,
- Rick, Hartmut,
- Robins, S A,
- Rodning, N L,
- Roney, J M,
- Rosati, S,
- Roscoe, K,
- Rossi, A M,
- Rozen, Y,
- Runge, K,
- Runólfsson, O,
- Rust, D R,
- Sachs, K,
- Saeki, T,
- Sahr, O,
- Sang, W M,
- Sarkisyan-Grinbaum, E,
- Sbarra, C,
- Schaile, A D,
- Schaile, O,
- Scharff-Hansen, P,
- Schieck, J,
- Schmitt, S,
- Schöning, A,
- Schröder, M,
- Schumacher, M,
- Schwick, C,
- Scott, W G,
- Seuster, R,
- Shears, T G,
- Shen, B C,
- Shepherd-Themistocleous, C H,
- Sherwood, P,
- Siroli, G P,
- Skuja, A,
- Smith, A M,
- Snow, G A,
- Sobie, Randall J,
- Söldner-Rembold, S,
- Spagnolo, S,
- Sproston, M,
- Stahl, A,
- Stephens, K,
- Stoll, K,
- Strom, D,
- Ströhmer, R,
- Surrow, B,
- Tafirout, R,
- Talbot, S D,
- Taras, P,
- Tarem, S,
- Teuscher, R,
- Thiergen, M,
- Thomas, J,
- Thomson, M A,
- Torrence, E,
- Towers, S,
- Trefzger, T M,
- Trigger, I,
- Trócsányi, Z L,
- Tsur, E,
- Turner-Watson, M F,
- Ueda, I,
- Van Kooten, R,
- Vannerem, P,
- Verzocchi, M,
- Voss, H,
- Wäckerle, F,
- Waller, D,
- Ward, C P,
- Ward, D R,
- Watkins, P M,
- Watson, A T,
- Watson, N K,
- Wells, P S,
- Wengler, T,
- Wermes, N,
- Wetterling, D,
- White, J S,
- Wilson, G W,
- Wilson, J A,
- Wyatt, T R,
- Yamashita, S,
- Zacek, V,
- Zer-Zion, D
|
Abstract |
|
Searches for unstable neutral and charged heavy leptons, N and L+-, and for excited states of neutral and charged leptons, nu*, e*, mu*, and tau*, have been performed in e+e- collisions using data collected by the OPAL detector at LEP. The data analysed correspond to an integrated luminosity of about 58pb-1 at a centre-of-mass energy of 183GeV, and about 10pb-1 each at 161GeV and 172GeV. No evidence for new particles was found. Lower limits on the masses of unstable heavy and excited leptons are derived. From the analysis of charged-current, neutral-current, and photonic decays of singly produced excited leptons, upper limits are determined for the ratio of the coupling to the compositeness scale, f/Lambda, for masses up to the kinematic limit. For excited leptons, the limits are established independently of the relative values of the coupling constants f and f'. |
Details der Publikation |
|