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Search for top quark production at the CERN\(\bar pp\) collider

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Zeitschrift für Physik C Particles and Fields

Abstract

The upgraded UA 2 detector has collected data corresponding to a total integrated luminosity of 7.5 pb−1 from\(\bar pp\) collisions at a centre of mass energy of 630 GeV during 1988 and 1989. A search has been performed for the production and decay of the top quark (t) or a member of a hypothetical fourth family (b′). No evidence has been found for such processes. Using the expected rates for production and decay branching ratios from the Standard Model, this implies that the top quark mass is greater than 69(71) GeV/c2, and that theb′ mass is greater than 54(57) GeV/c2, at 95(90)% confidence.

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Author information

Author notes

  1. P. Bagnaia

    Present address: Dipartimento di Fisica, Università di Roma, Italy

  2. B. De Lotto

    Present address: Dipartimento di Fisica, Università di Udine, Italy

  3. G. F. Egan & S. N. Tovey

    Present address: University of Melbourne, 3052, Parkville, Australia

  4. M. Fraternali & L. Perini

    Present address: Dipartimento di Fisica, Università di Palermo, Italy

  5. C. Gössling

    Present address: Institut für Physik, Universität Dortmund, FRG

  6. K. Hara

    Present address: University of Tsukuba, Tsukuba, Ibaraki 305, Japan

  7. E. Iacopini

    Present address: Scuola Normale Superiore, Pisa, Italy

  8. M. Livan

    Present address: Dipartimento di Fisica, Università di Cagliari, Italy

  9. M. Morganti

    Present address: Dipartimento di Fisica e INFN di Bologna, Università Bologna, Italy

  10. M. Primavera & M. Valdata-Nappi

    Present address: Dipartimento di Fisica dell'Università della Calabria, Cosenza, Italy

  11. J. G. Rushbrooke

    Present address: Bond University, 4217, Gold Coast, Queensland, Australia

Authors and Affiliations

  1. Laboratorium für Hochenergiephysik, Universität Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland

    K. Borer, A. Federspiel, K. Hara, E. Hugentobler, R. Moning, L. Müller, T. Pal & J. Schacher

  2. Cavendish Laboratory, University of Cambridge, CB3 OHE, Cambridge, UK

    R. E. Ansorge, R. S. De Wolf, M. Lefebvre, D. J. Munday, J. M. Pentney, J. G. Rushbrooke, S. L. Singh, P. S. Wells, T. O. White & S. A. Wotton

  3. CERN, CH-1211, Geneva 23, Switzerland

    P. Bagnaia, G. Blaylock, M. Bonesini, F. Costantini, L. Di Lella, G. F. Egan, K. F. Einsweiler, G. Fumagalli, O. Gildemeister, C. Gössling, V. G. Goggi, J. R. Hansen, S. Hellman, K. Hultqvist, J. Incandela, K. Jakobs, P. Jenni, M. Lefebvre, L. Linssen, P. Lubrano, L. Mapelli, K. Meier, C. Onions, T. Pal, M. A. Parker, G. Polesello, A. Poppleton, L. Rasmussen, S. Stapnes, S. N. Tovey, V. Vercesi, A. R. Weidberg & D. R. Wood

  4. Institut für Hochenergiephysik der Universität Heidelberg, Schröderstrasse 90, D-6900, Heidelberg, Federal Republic of Germany

    S. Grünendahl, E. E. Kluge, N. Kurz & H. Plothow-Besch

  5. Dipartimento di Fisica dell'Università di Milano and Sezione INFN Milano, I-20133, Milano, Italy

    M. Bonesini, D. Cavalli, G. Costa, F. Gianotti, L. Mandelli, M. Mazzanti, L. Perini & G. Polesello

  6. Laboratoire de l'Accélérateur Linéaire, Université de Paris-Sud, F-91405, Orsay, France

    T. Åkesson, R. Ansari, D. Buskulie, J. C. Chollet, L. Fayard, D. Froidevaux, J. M. Gaillard, B. Merkel, M. Moniez, G. Parrour, P. Petroff, J. P. Repellin & G. Unal

  7. Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and INFN, Sezione di Pavia, Via Bassi 6, I-27100, Pavia, Italy

    C. Conta, A. Dell'Acqua, B. De Lotto, R. Ferrari, M. Fraternali, G. Fumagalli, V. G. Goggi, M. Livan, F. Pastore, E. Pennacchio, A. Rimoldi & V. Vercesi

  8. Dipartimento di Fisica dell'Università di Perugia and INFN, Sezione di Perugia, via Pascoli, I-06100, Perugia, Italy

    P. Cenci, P. Lariccia, M. Pepe & P. Scampoli

  9. Dipartimento di Fisica dell'Università di Pisa and INFN, Sezione di Pisa, Via Livornese, S. Piero a Grado, I-56100, Pisa, Italy

    G. Carboni, V. Cavasinni, F. Costantini, T. Del Prete, E. Iacopini, S. Lami, M. Morganti, C. Petridou, M. Primavera & M. Valdata-Nappi

  10. Centre d'Etudes Nucléaires de Saclay, F-91191, Gif-sur-Yvette Cedex, France

    J. Alitti, P. Bareyre, P. Bonamy, C. Magneville, J. P. Meyer, A. V. Stirling & H. Zaccone

Authors
  1. T. Åkesson
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  2. J. Alitti
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  3. R. Ansari
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  4. R. E. Ansorge
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  5. P. Bagnaia
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  6. P. Bareyre
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  7. G. Blaylock
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  8. P. Bonamy
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  9. M. Bonesini
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  10. K. Borer
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  11. D. Buskulie
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  12. G. Carboni
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  13. D. Cavalli
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  14. V. Cavasinni
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  15. P. Cenci
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  16. J. C. Chollet
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  17. C. Conta
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  18. G. Costa
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  19. F. Costantini
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  20. A. Dell'Acqua
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  21. B. De Lotto
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  22. T. Del Prete
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  23. R. S. De Wolf
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  26. K. F. Einsweiler
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  27. L. Fayard
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  28. A. Federspiel
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  29. R. Ferrari
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  30. M. Fraternali
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  31. D. Froidevaux
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  32. G. Fumagalli
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  33. J. M. Gaillard
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  34. F. Gianotti
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  35. O. Gildemeister
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  36. C. Gössling
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  37. V. G. Goggi
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  40. K. Hara
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  43. K. Hultqvist
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  75. M. Pepe
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  79. H. Plothow-Besch
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  80. M. Primavera
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  81. G. Polesello
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  82. A. Poppleton
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  84. J. P. Repellin
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  86. J. G. Rushbrooke
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  87. P. Scampoli
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  88. J. Schacher
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  89. S. L. Singh
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  90. S. Stapnes
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  91. A. V. Stirling
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  92. S. N. Tovey
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  93. G. Unal
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  94. M. Valdata-Nappi
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  95. V. Vercesi
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  96. A. R. Weidberg
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  97. P. S. Wells
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  101. H. Zaccone
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UA 2 Collaboration., Åkesson, T., Alitti, J. et al. Search for top quark production at the CERN\(\bar pp\) collider. Z. Phys. C - Particles and Fields 46, 179–189 (1990). https://doi.org/10.1007/BF01555995

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  • DOI: https://doi.org/10.1007/BF01555995

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