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An upper limit on the branching ratio for τ decays into seven charged particles

  • K. Ackerstaff*
  • , G. Alexander
  • , J. Allison
  • , N. Altekamp
  • , K. J. Anderson
  • , S. Anderson
  • , S. Arcelli
  • , S. Asai
  • , D. Axen
  • , G. Azuelos
  • , A. H. Ball
  • , E. Barberio
  • , R. J. Barlow
  • , R. Bartoldus
  • , J. R. Batley
  • , S. Baumann
  • , J. Bechtluft
  • , C. Beeston
  • , T. Behnke
  • , A. N. Bell
  • K. W. Bell, G. Bella, S. Bentvelsen, P. Berlich, S. Bethke, O. Biebel, A. Biguzzi, S. D. Bird, V. Blobel, I. J. Bloodworth, J. E. Bloomer, M. Bobinski, P. Bock, D. Bonacorsi, M. Boutemeur, B. T. Bouwens, S. Braibant, L. Brigliadori, R. M. Brown, H. J. Burckhart, C. Burgard, R. Bürgin, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, D. Chrisman, P. E.L. Clarke, I. Cohen, J. E. Conboy, O. C. Cooke, M. Cuffiani, S. Dado, C. Dallapiccola, G. M. Dallavalle, S. de Jong, L. A. del Pozo, K. Desch, M. S. Dixit, E. do Couto e Silva, M. Doucet, E. Duchovni, G. Duckeck, I. P. Duerdoth, D. Eatough, J. E.G. Edwards, P. G. Estabrooks, H. G. Evans, M. Evans, F. Fabbri, M. Fanti, A. A. Faust, F. Fiedler, M. Fierro, H. M. Fischer, I. Fleck, R. Folman, D. G. Fong, M. Foucher, A. Fürtjes, D. I. Futyan, P. Gagnon, J. W. Gary, J. Gascon, S. M. Gascon-Shotkin, N. I. Geddes, C. Geich-Gimbel, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, D. M. Gingrich, D. Glenzinski, J. Goldberg, M. J. Goodrick, W. Gorn, C. Grandi, E. Gross, J. Grunhaus, M. Gruwé, C. Hajdu, G. G. Hanson, M. Hansroul, M. Hapke, C. K. Hargrove, P. A. Hart, C. Hartmann, M. Hauschild, C. M. Hawkes, R. Hawkings, R. J. Hemingway, M. Herndon, G. Herten, R. D. Heuer, M. D. Hildreth, J. C. Hill, S. J. Hillier, T. Hilse, P. R. Hobson, R. J. Homer, A. K. Honma, D. Horváth, R. Howard, D. E. Hutchcroft, P. Igo-Kemenes, D. C. Imrie, M. R. Ingram, K. Ishii, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, A. Joly, C. R. Jones, G. Jones, M. Jones, U. Jost, P. Jovanovic, T. R. Junk, D. Karlen, V. Kartvelishvili, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, J. Kirk, A. Klier, S. Kluth, T. Kobayashi, M. Kobel, D. S. Koetke, T. P. Kokott, M. Kolrep, S. Komamiya, T. Kress, P. Krieger, J. von Krogh, P. Kyberd', G. D. Lafferty, R. Lahmann, W. P. Lai, D. Lanske, J. Lauber, S. R. Lautenschlager, J. G. Layter, D. Lazic, A. M. Lee, E. Lefebvre, D. Lellouch, J. Letts, L. Levinson, S. L. Lloyd, F. K. Loebinger, G. D. Long, M. J. Losty, J. Ludwig, A. Macchiolo, A. Macpherson, M. Mannelli, S. Marcellini, C. Markus, A. J. Martin, J. P. Martin, G. Martinez, T. Mashimo, P. Mättig, W. J. McDonald, J. McKenna, E. A. Mckigney, T. J. McMahon, R. A. McPherson, F. Meijers, S. Menke, ES Merritt, H. Mes, J. Meyer, A. Michelini, G. Mikenberg, D. J. Miller, A. Mincer, R. Mir, W. Mohr, A. Montanari, T. Mori, M. Morii, U. Müller, K. Nagai, I. Nakamura, H. A. Neal, B. Nellen, R. Nisius, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, N. J. Oldershaw, M. J. Oreglia, S. Orito, J. Pálinkás, G. Pásztor, J. R. Pater, G. N. Patrick, J. Patt, M. J. Pearce, S. Petzold, P. Pfeifenschneider, J. E. Pilcher, J. Pinfold, D. E. Plane, P. Poffenberger, B. Poli, A. Posthaus, H. Przysiezniak, D. L. Rees, D. Rigby, S. Robertson, S. A. Robins, N. Rodning, J. M. Roney, A. Rooke, E. Ros, A. M. Rossi, M. Rosvick, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, U. Ruppel, D. R. Rust, R. Rylko, K. Sachs, T. Saeki, E. K.G. Sarkisyan, C. Sbarra, A. D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, P. Schenk, J. Schieck, P. Schleper, B. Schmitt, S. Schmitt, A. Schöning, M. Schröder, H. C. Schultz-Coulon, M. Schulz, M. Schumacher, C. Schwick, W. G. Scott, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Sittler, A. Skillman, A. Skuja, A. M. Smith, G. A. Snow, R. Sobie, S. Söldner-Rembold, R. W. Springer, M. Sproston, K. Stephens, J. Steuerer, B. Stockhausen, K. Stoll, D. Strom, P. Szymanski, R. Tafirout, S. D. Talbot, S. Tanaka, P. Taras, S. Tarem, R. Teuscher, M. Thiergen, M. A. Thomson, E. von Törne, S. Towers, I. Trigger, E. Tsur, A. S. Turcot, M. F. Turner-Watson, P. Utzat, R. van Kooten, M. Verzocchi, P. Vikas, E. H. Vokurka, H. Voss, F. Wäckerle, A. Wagner, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. S. Wells, N. Wermes, J. S. White, B. Wilkens, G. W. Wilson, J. A. Wilson, G. Wolf, T. R. Wyatt, S. Yamashita, G. Yekutieli, V. Zacek, D. Zer-Zion
*Corresponding author for this work
  • CERN
  • University of Manchester
  • University of Cambridge
  • The University of Chicago
  • Indiana University Bloomington
  • University of Bologna
  • The University of Tokyo
  • Kobe University
  • University of British Columbia
  • University of Montreal
  • University of Maryland, College Park
  • University of Bonn
  • RWTH Aachen University
  • University of Birmingham
  • Rutherford Appleton Laboratory
  • University of Freiburg
  • University of Hamburg
  • Heidelberg University 
  • Ludwig Maximilian University of Munich
  • Carleton University
  • Queen Mary University of London
  • Royal Society University Research Fellow
  • University of California at Riverside
  • University College London
  • Tel Aviv University
  • Technion-Israel Institute of Technology
  • Weizmann Institute of Science
  • University of Alberta
  • TRIUMF
  • Research Institute for Particle and Nuclear Physics
  • Brunel University London
  • University of Victoria BC
  • Institute for Nuclear Research
  • University of Oregon
  • Duke University
  • New York University
  • University of Debrecen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We have searched for decays of the τ lepton into seven or more charged particles, using data collected with the OPAL detector from 1990 to 1995 in e+e- collisions at √s ≈ Mz. No candidate events were found and an upper limit on the branching ratio for T decays into seven charged particles of 1.8 × 10-5 at the 95% confidence level was determined.

Original languageEnglish
Pages (from-to)213-222
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume404
Issue number1-2
DOIs
StatePublished - 3 Jul 1997

Funding

FundersFunder number
Israel Academy of Sciences and Humanities
National Science Foundation
Israel Science Foundation
Direction des Sciences de la Mati~re du Commissariat l'Energie Atomique
U.S. Department of Energy
Minerva Gesellschaft
German Israeli Bi-national Science Foundation
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
National Research Council Canada
Ministry of Education, Culture, Sports, Science and Technology
Hungarian Foundation for Scientific ResearchOTKA T-016660, OTKA F-023259, T023793

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