Search for new heavy quarks in proton-antiproton collisions at {Mathematical expression}

C. Albajar, M. G. Albrow, O. C. Allkofer, B. Andrieu, K. Ankoviak, R. Apsimon, B. Aubert, C. Bacci, S. Bartha, G. Bauer, S. Beingessner, A. Bettini, A. Bezaguet, P. Biddulph, H. Bohn, A. Böhrer, R. Bonino, K. Bos, M. Botlo, D. BrockhausenC. Buchanan, B. Buschbeck, G. Busetto, A. Caner, P. Casoli, H. Castilla-Valdez, F. Cavanna, P. Cennini, S. Centro, F. Ceradini, G. Ciapetti, S. Cittolin, E. Clayton, D. Cline, J. Colas, R. Conte, J. A. Coughlan, G. Cox, D. Dau, C. Daum, M. DeGiorgi, M. Della Negra, M. Demoulin, D. Denegri, H. Dibon, A. DiCiaccio, F. J. Diez Hedo, L. Dobrzynski, J. Dorenbosch, J. D. Dowell, D. Drijard, K. Eggert, E. Eisenhandler, N. Ellis, P. Erhard, H. Evans, H. Faissner, M. Felcini, I. F. Fensome, A. Ferrando, L. Fortson, T. Fuess, J. Garvey, A. Geiser, A. Givernaud, A. Gonidec, B. Gonzalez, J. M. Gregory, J. Gronberg, D. J. Holthuizen, W. Jank, M. Jimack, G. Jorat, M. I. Josa, P. I P Kalmus, V. Karimäki, I. Kenyon, R. Kinnunen, M. Krammer, J. Kroll, D. Kryn, F. Lacava, S. Lammel, M. Landon, Y. Lemoigne, R. Leuchs, S. Levegrün, M. Lindgren, D. Linglin, P. Lipa, C. Markou, M. Markytan, M. A. Marquina, R. Martinelli, G. Maurin, S. McMahon, J. P. Mendiburu, A. Meneguzzo, J. P. Merlo, T. Meyer, T. Moers, M. Mohammadi, K. Morgan, A. Morsch, A. Moulin, Th Muller, R. Munoz, L. Naumann, P. Nedelec, M. Nikitas, A. Nisati, A. Norton, V. O'Dell, S. Otwinowski, G. Pancheri, M. Passaseo, F. Pauss, E. Petrolo, G. Piano Mortari, E. Pietarinen, M. Pimiä, A. Placci, L. Pontecorvo, J. P. Porte, R. Prosi, E. Rademacher, M. Rauschkolb, H. Reithler, J. P. Revol, S. Robins, D. Robinson, T. Rodrigo, J. Rohlf, C. Rubbia, G. Sajot, J. M. Salicio, D. Samyn, D. Schinzel, M. Schröder, C. Seez, T. P. Shah, P. Sphicas, D. Stork, C. Stubenrauch, K. Sumorok, F. Szoncso, A. Taurok, L. Taylor, S. Tether, G. Thompson, E. Torrente-Lujan, E. Tscheslog, H. Tuchscherer, J. Tuominiemi, W. van de Guchte, A. van Dijk, M. Vargas, S. Veneziano, J. P. Vialle, T. S. Virdee, W. von Schlippe, J. Vrana, V. Vuillemin, K. Wacker, G. Walzel, X. Wu, C. E. Wulz, M. Yvert, I. Zacharov, L. Zanello, Y. Zolnierowski, P. Zotto

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31 Scopus citations

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 {Mathematical expression} 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 the t-quark and 43 GeV/c2 (95% CL) for a fourth-generation charge-1/3 quark (b′-quark).

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalZeitschrift für Physik C Particles and Fields
Volume48
Issue number1
DOIs
StatePublished - Mar 1990

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