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A measurement of electron production in hadronic Z0 decays and a determination of {Mathematical expression}

  • P. D. Acton
  • , G. Alexander
  • , J. Allison
  • , P. P. Allport
  • , K. J. Anderson
  • , S. Arcelli
  • , P. Ashton
  • , A. Astbury
  • , D. Axen
  • , G. Azuelos
  • , G. A. Bahan
  • , J. T.M. Baines
  • , A. H. Ball
  • , J. Banks
  • , G. J. Barker
  • , R. J. Barlow
  • , J. R. Batley
  • , G. Beaudoin
  • , A. Beck
  • , J. Becker
  • T. Behnke, K. W. Bell, G. Bella, P. Berlich, S. Bethke, O. Biebel, U. Binder, I. J. Bloodworth, P. Bock, B. Boden, H. M. Bosch, S. Bougerolle, B. B. Brabson, 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, P. E.L. Clarke, I. Cohen, W. J. Collins, J. E. Conboy, M. Cooper, M. Couch, M. Coupland, M. Cuffiani, S. Dado, G. M. Dallavalle, S. De Jong, P. Debu, L. A. del Pozo, M. M. Deninno, A. Dieckmann, M. Dittmar, M. S. Dixit, E. do Conto el Silva, E. Duchovni, G. Duckeck, I. P. Duerdoth, D. J.P. Dumas, P. A. Elcombe, P. G. Estabrooks, E. Etzion, H. G. Evans, F. Fabbri, M. Fincke-Keeler, H. M. Fischer, D. G. Fong, C. Fukunaga, A. Gaidot, O. Ganel, J. W. Gary, J. Gascon, R. F. McGowan, N. I. Geddes, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, G. Giacomelli, V. Gibson, W. R. Gibson, J. D. Gillies, J. Goldberg, M. J. Goodrick, W. Gorn, C. Grandi, F. C. Grant, J. Hagemann, G. G. Hanson, M. Hansroul, C. K. Hargrove, P. F. Harrison, J. Hart, P. M. Hattersley, M. Hauschild, C. M. Hawkes, E. Heflin, R. J. Hemingway, R. D. Heuer, J. C. Hill, S. J. Hillier, D. A. Hinshaw, C. Ho, J. D. Hobbs, P. R. Hobson, D. Hochman, R. J. Homer, A. K. Honma, S. R. Hou, C. P. Howarth, R. E. Hughes-Jones, R. Humbert, P. Igo-Kemenes, H. Ihssen, D. C. Imrie, A. C. Janissen, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, M. Jobes, R. W.L. Jones, P. Jovanovic, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, D. E. Klem, T. Kobayashi, T. P. Kokott, S. Komamiya, L. Köpke, J. F. Kral, R. Kowalewski, H. Kreutzmann, J. von Krogh, J. Kroll, M. Kuwano, P. Kyberd, G. D. Lafferty, F. Lamarche, W. J. Larson, J. G. Layter, P. Le Du, P. Leblanc, A. M. Lee, M. H. Lehto, D. Lellouch, P. Lennert, C. Leroy, J. Letts, S. Levegrün, L. Levinson, S. L. Lloyd, F. K. Loebinger, J. M. Lorah, B. Lorazo, M. I. Losty, X. C. Lou, J. Ludwig, M. Mannelli, S. Marcellini, G. Maringer, A. J. Martin, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, J. McKenna, T. J. McMahon, J. R. McNutt, F. Meijers, D. Menszner, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, J. Mildenberger, D. J. Miller, R. Mir, W. Mohr, C. Moisan, A. Montanari, T. Mori, M. W. Moss, T. Mouthuy, B. Nellen, H. H. Nguyen, S. W. O'Neale, B. P. O'Neill, F. G. Oakham, F. Odirici, M. Ogg, H. O. Ogren, H. Oh, C. J. Oram, M. J. Oreglia, S. Orito, J. P. Pansart, B. Panzer-Steindel, P. Paschievici, G. N. Patrick, S. J. Pawley, P. Pfister, J. E. Pilcher, D. Pitman, D. E. Plane, P. Poffenberger, B. Poli, A. Pouladdej, E. Prebys, T. W. Pritchard, H. Przysiezniak, G. Quast, M. W. Redmond, D. L. Rees, K. Riles, S. A. Robins, D. Robinson, A. Rollnik, J. M. Roney, E. Ros, S. Rossberg, A. M. Rossi, M. Rosvick, P. Routenburg, K. Runge, O. Runolfsson, D. R. Rust, S. Sanghera, M. Sasaki, A. D. Schaile, O. Schaile, W. Schappert, P. Scharff-Hansen, P. Schenk, H. von der Schmitt, S. Schreiber, J. Schwiening, W. G. Scott, M. Settles, B. C. Shen, P. Sherwood, R. Shypit, A. Simon, P. Singh, G. P. Siroli, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, R. Sobie, R. W. Springer, M. Sproston, K. Stephens, R. Ströhmer, D. Strom, H. Takeda, T. Takeshita, P. Taras, S. Tarem, P. Teixeira-Dias, N. J. Thackray, G. Transtromer, T. Tsukamoto, M. F. Turner, G. Tysarczyk-Niemeyer, D. Van den plas, R. Van Kooten, G. J. VanDalen, G. Vasseur, C. J. Virtue, A. Wagner, D. L. Wagner, C. Wahl, J. P. Walker, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, M. Weber, P. Weber, S. Weisz, P. S. Wells, N. Wermes, M. A. Whalley, G. W. Wilson, J. A. Wilson, I. Wingerter, V. H. Winterer, T. Wlodek, N. C. Wood, S. Wotton, T. R. Wyatt, R. Yaari, Y. Yang, G. Yekutieli, M. Yurko, W. Zeuner, G. T. Zorn
  • Brunel University London
  • Tel Aviv University
  • University of Manchester
  • University of Cambridge
  • The University of Chicago
  • University of Bologna
  • University of Victoria BC
  • University of British Columbia
  • University of Montreal
  • University of Maryland, College Park
  • Queen Mary University of London
  • University of Freiburg
  • University of Hamburg
  • STFC Rutherford Appleton Laboratory
  • Heidelberg University 
  • University of Bonn
  • University of Birmingham
  • Indiana University Bloomington
  • CERN
  • Carleton University
  • University College London
  • Technion-Israel Institute of Technology
  • Birkbeck University of London
  • CEA Saclay
  • University of California at Riverside
  • Weizmann Institute of Science
  • The University of Tokyo
  • Kobe University
  • National Research Council of Canada

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The production rate of electrons with momentum p>4 GeV/c and large momentum transverse to the jet containing the electron has been measured in 136000 hadronic decays of the Z0 recorded with the OPAL detector at LEP in 1990. The dominant source of these electrons is the semileptonic decay of hadrons containing b quarks. If we assume that the semileptonic branching fraction of b hadrons produced on the Z0 resonance is the same as the branching fraction measured at the Υ{hooked}(4 S) resonance, we determine {Mathematical expression} MeV, where the first error is statistical and the second error is systematic. The sensitivity of the result to this assumption is discussed. We have reduced the dependence of our result on the model of b hadron semileptonic decay by taking into account the correlation between the model dependence of the branching fractions measured at the Υ{hooked}(4 S) and of our kinematic acceptance for electrons.

Original languageEnglish
Pages (from-to)191-207
Number of pages17
JournalEuropean Physical Journal C
Volume55
Issue number2
DOIs
StatePublished - Jun 1992

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