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Search for new heavy quarks in proton-antiproton collisions at\(\sqrt s = 0.63 TeV\)

  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

We report on a search for new heavy quarks decaying semileptonically into muons, using 4.7 pb−1 of data taken during the CERN\(p\bar p\) collider runs in 1988 and 1989. The properties of isolated muons accompanied by jets are consistent with the predictions from the Standard Model but do not show a signal for a new heavy quark. Combining all the UA1 data (5.4 pb−1), lower mass limits are obtained at 60 GeV/c2 (95% CL) for thet-quark and 43 GeV/c2 (95% CL) for a fourth-generation charge-1/3 quark (b′-quark).

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Authors and Affiliations

  1. Aachen

    A. Böhrer, P. Erhard, H. Faissner, A. Geiser, S. Lammel, T. Moers, A. Moulin, H. Reithler, E. Tscheslog, H. Tuchscherer & K. Wacker

  2. (NIKHEF), Amsterdam

    K. Bos, C. Daum, J. Dorenbosch, D. J. Holthuizen, M. Schröder, W. van de Guchte & A. van Dijk

  3. (LAPP), Annecy

    B. Aubert, S. Beingessner, F. Cavanna, J. Colas, D. Linglin, J. P. Vialle & M. Yvert

  4. Birmingham

    G. Cox, J. D. Dowell, N. Ellis, I. F. Fensome, J. Garvey, J. M. Gregory, I. Kenyon & M. Nikitas

  5. Boston

    G. Bauer, M. Felcini, K. Morgan, S. Otwinowski & J. Rohlf

  6. Helsinki

    V. Karimäki, R. Kinnunen, E. Pietarinen, M. Pimiä & J. Tuominiemi

  7. Kiel

    O. C. Allkofer, S. Bartha, H. Bohn, D. Brockhausen, D. Dau, R. Leuchs, S. Levegrün, A. Morsch, R. Prosi & M. Rauschkolb

  8. Imperial College, London

    E. Clayton, C. Markou, S. McMahon, C. Seez, L. Taylor & T. S. Virdee

  9. Queen Mary College, London

    P. Biddulph, E. Eisenhandler, P. I. P. Kalmus, M. Landon, S. Robins, D. Robinson, G. Thompson & W. von Schlippe

  10. CIEMAT, Madrid

    A. Ferrando, M. I. Josa, J. M. Salicio & E. Torrente-Lujan

  11. Padua

    A. Bettini, G. Busetto, A. Caner, P. Casoli, S. Centro, R. Conte, M. DeGiorgi, R. Martinelli, A. Meneguzzo & Y. Zolnierowski

  12. College de France, Paris

    B. Andrieu, L. Dobrzynski, D. Kryn, J. -P. Mendiburu, P. Nedelec, G. Sajot & J. Vrana

  13. Rome

    C. Bacci, F. Ceradini, G. Ciapetti, A. DiCiaccio, F. Lacava, A. Nisati, M. Passaseo, E. Petrolo, G. Piano Mortari, L. Pontecorvo, S. Veneziano & L. Zanello

  14. CEN, Saclay

    D. Denegri, Y. Lemoigne & J. P. Merlo

  15. Vienna

    M. Botlo, B. Buschbeck, H. Dibon, M. Krammer, P. Lipa, M. Markytan, F. Szoncso, A. Taurok & C. -E. Wulz

Authors
  1. C. Albajar
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UA1 Collaboration

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This paper is dedicated to the memory of Bruno Gonzalez who participated in collecting the data analysed here but who died in an accident on his way to a data-taking shift

CERN

MIT

Rutherford Appleton Lab

UCLA

Deceased

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UA1 Collaboration., Albajar, C., Albrow, M.G. et al. Search for new heavy quarks in proton-antiproton collisions at\(\sqrt s = 0.63 TeV\) . Z. Phys. C - Particles and Fields 48, 1–12 (1990). https://doi.org/10.1007/BF01565600

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  • DOI: https://doi.org/10.1007/BF01565600

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