학술논문

Search for unstable heavy and excited leptons in e+e collisions at ∝s = 170-172 GeV
Document Type
Article
Author
Ackerstaff, K.Alexander, G.Allison, J.Altekamp, N.Anderson, K.Anderson, S.Arcellie, S.Asai, S.Axen, D.Azuelos, G.Ball, A.Barberio, E.Barlow, R.Bartoldus, R.Batley, J.Baumann, S.Bechtluft, J.Beeston, C.Behnke, T.Bell, A.Bell, K.Bella, G.Bentvelsen, S.Bethke, S.Biebel, O.Biguzzi, A.Bird, S.Blobel, V.Bloodworth, I.Bloomer, J.Bobinski, M.Bock, P.Bonacorsi, D.Boutemeur, M.Bouwens, B.Braibant, S.Brigliadori, L.Brown, R.Burckhart, H.Burgard, C.Bürgin, R.Capiluppi, P.Carnegie, R.Carter, A.Carter, J.Chang, C.Charlton, D.Chrisman, D.Clarke, P.Cohen, I.Conboy, J.Cooke, O.Cuffiani, M.Dado, S.Dallapiccola, C.Dallavalle, G.Davis, R.Jong, S.Pozo, L.Desch, K.Dienes, B.Dixit, M.Couto e Silva, E.Doucet, M.Duchovni, E.Duckeck, G.Duerdoth, I.Eatough, D.Edwards, J.Estabrooks, P.Evans, H.Evans, M.Fabbri, F.Fanti, M.Faust, A.Fiedler, F.Fierro, M.Fischer, H.Fleck, I.Folman, R.Fong, D.Foucher, M.Fürtjes, A.Futyan, D.Gagnon, P.Gary, J.Gascon, J.Gascon-Shotkin, S.Geddes, N.Geich-Gimbe, C.Geralis, T.Giacomelli, G.Giacomelli, P.Giacomelli, R.Gibson, V.Gibson, W.Gingrich, D.Glenzinski, D.Goldberg, J.Goodrick, M.Gorn, W.Grandi, C.Gross, E.Grunhaus, J.Gruwé, M.Hajdu, C.Hanson, G.Hansroul, M.Hapke, M.Hargrove, C.Hart, P.Hartmann, C.Hauschild, M.Hawkes, C.Hawkings, R.Hemingway, R.Herndon, M.Herten, G.Heuer, R.Hildreth, M.Hill, J.Hillier, S.Hobson, P.Homer, R.Honma, A.Horvdth, D.Hossain, K.Howard, R.Hüntemeyer, P.Hutchcroft, D.Igo-Kemenes, P.Imrie, D.Ingram, M.Ishii, K.Jawahery, A.Jeffreys, P.Jeremie, H.Jimack, M.Joly, A.Jones, C.Jones, G.Jones, M.Jost, U.Jovanovic, P.Junk, T.Karlen, D.Kartvelishvili, V.Kawagoe, K.Kawamoto, T.Kayal, P.Keeler, R.Kellogg, R.Kennedy, B.Kirk, J.Klier, A.Kluth, S.Kobayashi, T.Kobel, M.Koetke, D.Kokott, T.Kolrep, M.Komamiya, S.Kress, T.Krieger, P.Krogh, J.Kyberd, P.Lafferty, G.Lahmann, R.Lai, W.Lanske, D.Lauber, J.Lautenschlager, S.Layter, J.Lazic, D.Lee, A.Lefebvre, E.Lellouch, D.Letts, J.Levinson, L.Lloyd, S.Loebinger, F.Loug, G.Losty, M.Ludwig, J.Macchiolo, A.Macpherson, A.Mannelli, M.Marcellini, S.Markus, C.Martin, A.Martin, J.Martinez, G.Mashimo, T.Mättig, P.McDonald, W.McKenna, J.Mckigney, E.McMahon, T.McPherson, R.Meijers, F.Menke, S.Merritt, F.Mes, H.Meyer, J.Michelini, A.Mikenberg, G.Miller, D.Mincer, A.Mir, R.Mohr, W.Montanari, A.Mori, T.Morii, M.Müller, U.Mihara, S.Nagai, K.Nakamura, I.Neal, H.Nellen, B.Nisius, R.O'Neale, S.Oakham, F.Odorici, F.Ogren, H.Oh, A.Oldershaw, N.Oreglia, M.Orito, S.Pálinkás, J.Pásztor, G.Pater, J.Patrick, G.Patt, J.Pearce, M.Perez-Ochoa, R.Petzold, S.Pfeifenschneider, P.Pilcher, J.Pinfold, J.Plane, D.Poffenberger, P.Poli, B.Posthaus, A.Rees, D.Rigby, D.Robertson, S.Robins, S.Rodning, N.Roney, J.Rooke, A.Ros, E.Rossi, A.Routenburg, P.Rozen, Y.Runge, K.Runolfsson, O.Ruppel, U.Rust, D.Rylko, R.Sachs, K.Saeki, T.Sarkisyan, E.Sbarra, C.Schaile, A.Schaile, O.Scharf, F.Scharf-Hansen, P.Schenk, P.Schieck, J.Schleper, P.Schmitt, B.Schmitt, S.Schöning, A.Schröder, M.Schultz-Coulon, H.Schumacher, M.Schwick, C.Scott, W.Shears, T.Shen, B.Shepherd-Themistocleous, C.Sherwood, P.Siroli, G.Sittler, A.Skillman, A.Skuja, A.Smith, A.Snow, G.Sobie, R.Söldner-Rembold, S.Springer, R.Sproston, M.Stephens, K.Steuerer, J.Stockhausen, B.Stoll, K.Strom, D.Szymanski, StromTafirout, R.Talbot, S.Tanaka, S.Taras, P.Tarem, S.Teuscher, R.Thiergen, M.Thomson, M.Törne, E.Towers, S.Trigger, I.Trócsányi, Z.Tsur, E.Turcot, A.Turner-Watson, M.Utzat, P.Kooten, R.Verzocchi, M.Vikas, P.Vokurka, E.Voss, H.Wäckerle, F.Wagner, A.Ward, C.Wards, D.Watkins, P.Watson, A.Watson, N.Wells, P.Wermes, N.White, J.Wilkens, B.Wilson, G.Wilson, J.Wolf, G.Wyatt, T.Yamashita, S.Yekutieli, G.Zacek, V.Zer-Zion, D.
Source
Zeitschrift für Physik C Particles and Fields; March 1979, Vol. 1 Issue: 1-2 p45-64, 20p
Subject
Language
ISSN
01709739; 14315858
Abstract
We have searched for unstable neutral and charged heavy leptons, N and L±, and for excited states of neutral and charged leptons, ν* e*, μ* and τ*, in e+e collisions at centre-of-mass energies of 170 and 172 GeV using the OPAL detector at LEP. No evidence for their existence was found. From the analysis of charged-current decays of pair-produced unstable heavy leptons, and of charged-current and photonic decays of pair-produced excited leptons, lower limits on their masses are derived. From the analysis of charged-current and photonic decays of singly-produced excited leptons, upper limits on the ratio of the coupling to the compositeness scale, ϕ/λ, are determined for masses up to the kinematic limit.