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Search for unstable heavy and excited leptons in e+e− collisions at ∝s = 170-172 GeV

Authors :
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, Strom
Tafirout, 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
Publication Year :
1979

Abstract

We have searched for unstable neutral and charged heavy leptons, N and L<superscript>±</superscript>, and for excited states of neutral and charged leptons, ν<superscript>*</superscript> e<superscript>*</superscript>, μ<superscript>*</superscript> and τ<superscript>*</superscript>, in e<superscript>+</superscript>e<superscript>−</superscript> 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.

Details

Language :
English
ISSN :
01709739 and 14315858
Volume :
1
Issue :
1-2
Database :
Supplemental Index
Journal :
Zeitschrift für Physik C Particles and Fields
Publication Type :
Periodical
Accession number :
ejs15715547
Full Text :
https://doi.org/10.1007/BF01245797
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