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A study of jet production rates and a test of QCD on the Z0 resonance

  • M. Z. Akrawy
  • , G. Alexander
  • , J. Allison
  • , P. P. Allport
  • , K. J. Anderson
  • , J. C. Armitage
  • , G. T.J. Arnison
  • , P. Ashton
  • , G. Azuelos
  • , J. T.M. Baines
  • , A. H. Ball
  • , J. Banks
  • , G. J. Barker
  • , R. J. Barlow
  • , J. R. Batley
  • , G. Bavaria
  • , C. Beard
  • , F. Beck
  • , K. W. Bell
  • , G. Bella
  • S. Bethke, O. Biebel, I. J. Bloodworth, P. Bock, H. Boerner, H. Breuker, R. M. Brown, R. Brun, A. Buijs, H. J. Burckhart, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, J. T.M. Chrin, I. Cohen, J. E. Conboy, M. Couch, M. Coupland, M. Cuffiani, S. Dado, G. M. Dallavalle, O. W. Davies, M. M. Deninno, A. Dieckmann, M. Dittmar, M. S. Dixit, D. Duchesneau, E. Duchovni, I. P. Duerdoth, D. Dumas, H. El Mamouni, P. A. Elcombe, P. G. Estabrooks, F. Fabbri, P. Farthouat, H. M. Fischer, D. G. Fong, M. T. French, C. Fukunaga, B. Gandois, O. Ganel, J. W. Gary, N. I. Geddes, C. N.P. Gee, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, G. Giacomelli, W. R. Gibson, J. D. Gillies, J. Goldberg, M. J. Goodrick, W. Gorn, D. Granite, E. Gross, P. Grosse-Wiesmann, J. Grunhaus, H. Hagedorn, J. Hagemann, M. Hansroul, C. K. Hargrove, J. Hart, P. M. Hattersley, D. Hatzifotiadou, M. Hauschild, C. M. Hawkes, E. Heflin, J. Heintze, R. J. Hemingway, R. D. Heuer, J. C. Hill, S. J. Hillier, P. S. Hinde, C. Ho, J. D. Hobbs, P. R. Hobson, D. Hochman, B. Holl, R. J. Homer, S. R. Hou, C. P. Howarth, R. E. Hughes-Jones, P. Igo-Kemenes, M. Imori, D. C. Imrie, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, E. Jin, M. Jobes, R. W.L. Jones, P. Jovanovic, D. Karlen, K. Kawagoe, T. Kawamoto, R. G. Kellogg, B. W. Kennedy, C. Kleinwort, D. E. Klem, G. Knop, T. Kobayashi, L. Köpke, T. P. Kokott, M. Koshiba, R. Kowalewski, H. Kreutzmann, J. Von Krogh, J. Kroll, P. Kyberd, G. D. Lafferty, F. Lamarche, W. J. Larson, M. M.B. Lasota, J. G. Layter, P. Le Du, P. Leblanc, D. Lellouch, P. Lennert, L. Lessard, L. Levinson, S. L. Lloyd, F. K. Loebinger, J. M. Lorah, B. Lorazo, M. J. Losty, J. Ludwig, N. Lupu, J. Ma, A. A. Macbeth, M. Mannelli, S. Marcellini, G. Maringer, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, T. J. McMahon, A. C. McPherson, F. Meijers, D. Menszner, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, D. J. Miller, C. Milstene, M. Minowa, W. Mohr, A. Montanari, T. Mori, M. W. Moss, A. Muller, P. G. Murphy, W. J. Murray, B. Nellen, H. H. Nguyen, M. Nozaki, A. J.P. O'Dowd, S. W. O'Neale, B. O'Neill, F. G. Oakham, F. Odorici, M. Ogg, H. Oh, M. J. Oreglia, S. Orito, G. N. Patrick, S. J. Pawley, A. Perez, J. E. Pilcher, J. L. Pinfold, D. E. Plane, B. Poli, A. Possoz, A. Pouladdej, T. W. Pritchard, G. Quast, J. Raab, M. W. Redmond, D. L. Rees, M. Regimbald, K. Riles, C. M. Roach, F. Roehner, A. Rollnik, J. M. Roney, A. M. Rossi, P. Routenburg, K. Runge, O. Runolfsson, S. Sanghera, R. A. Sansum, M. Sasaki, B. J. Saunders, A. D. Schaile, O. Schaile, W. Schappert, P. Scharff-Hansen, H. von der Schmitt, S. Schreiber, J. Schwarz, A. Shapira, B. C. Shen, P. Sherwood, A. Simon, G. P. Siroli, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, E. J. Spreadbury, R. W. Springer, M. Sproston, K. Stephens, H. E. Stier, R. Ströhmer, D. Strom, H. Takeda, T. Takeshita, T. Tsukamoto, M. F. Turner, G. Tysarczyk, D. van den Plas, G. J. Vandalen, C. J. Virtue, A. Wagner, C. Wahl, H. Wang, C. P. Ward, D. R. Ward, J. Waterhouse, P. M. Watkins, A. T. Watson, N. K. Watson, M. Weber, S. Weisz, N. Wermes, M. Weymann, G. W. Wilson, J. A. Wilson, I. Wingerter, V. H. Winterer, N. C. Wood, S. Wotton, B. Wuensch, T. R. Wyatt, R. Yaari, H. Yamashita, Y. Yang, G. Yekutieli, W. Zeuner, G. T. Zorn, S. Zylberajch
  • Queen Mary University of London
  • Tel Aviv University
  • University of Manchester
  • University of Cambridge
  • The University of Chicago
  • Carleton University
  • STFC Rutherford Appleton Laboratory
  • University of Montreal
  • University of Maryland, College Park
  • CERN
  • Heidelberg University 
  • University of Bonn
  • University of Birmingham
  • National Institute for Nuclear Physics
  • University College London
  • Birkbeck University of London
  • Technion-Israel Institute of Technology
  • University of California at Riverside
  • National Research Council of Canada
  • Weizmann Institute of Science
  • CEA Saclay
  • The University of Tokyo
  • University of Freiburg
  • Brunel University London

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

Relative production rates of multijet hadronic final states of Z0 boson decays, observed in e+e- annihilation around 91 GeV centre of mass energy, are presented. The data can be well described by analytic O(αs2) QCD calculations and by QCD shower model calaculations with parameters as determined at lower energies. A first judgement of ΛMS and of the renormalization scale μ2 in O(αs2) QCD results in values similar to those obtained in the continuum of e+e- annihilations. Significant scaling violations are observed when the 3-jet fractions are compared to the corresponding results from smaller centre of mass energies. They can be interpreted as being entirely due tot the energy dependence of αs, as proposed by the nonabelian nature of QCD, The possibility of an energy independent coupling constant can be excluded with a significance of 5.7 standard deviations.

Original languageEnglish
Pages (from-to)389-398
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume235
Issue number3-4
DOIs
StatePublished - Feb 1 1990

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