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Measurement ofR and determination of the charged-particle multiplicity ine + e − annihilation at 13-113-113-1around 10 GeV

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Zeitschrift für Physik C Particles and Fields

Abstract

We have measured theR value in non-resonante + e − annihilation using the ARGUS detector at the storage ring DORIS II. At a centre-of-mass energy\(\sqrt s = 9.36\) GeV the ratio of the hadronic cross-section to the μ-pair cross section in lowest order QED has been determined to beR=3.46±0.03±0.13. In addition, we have measured the charged-particle multiplicities in non-resonant hadron production at\(\sqrt s = 10.47\) GeV just below theB \(\bar B\) threshold and in ϒ (4S) resonance decays. For the average charged-particle multiplicities in continuum events and ϒ(4S)→B \(\bar B\) decays we obtain <n>cont=8.35±0.02±0.20 and <n>ϒ(4s)=10.81±0.05±0.23.

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Author notes

  1. D. I. Britton, D. B. MacFarlane, P. M. Patel, Y. Tsipolitis & E. Tzamariudaki

    Present address: McGill University, Montreal, Quebec, Canada

  2. C. E. K. Charlesworth, P. Krieger, R. Kutschke, R. S. Orr, J. D. Prentice, S. C. Seidel, R. G. Van de Water & T. -S. Yoon

    Present address: University of Toronto, Toronto, Ontario, Canada

  3. K. W. Edwards & H. Kapitza

    Present address: Carleton University, Ottawa, Ontario, Canada

Authors and Affiliations

  1. DESY, Hamburg, Federal Republic of Germany

    H. Allrecht, H. Ehrlichmann, T. Hamacher, A. Krüger, A. Nau, A. Nippe, M. Reidenbach, M. Schäfer, H. Schröder, H. D. Schulz, F. Sefkow & R. Wurth

  2. Institut für Physik, Universität, Dortmund, Federal Republic of Germany

    R. D. Appuhn, C. Hast, G. Herrera, H. Kolanoski, A. Lange, A. Lindner, R. Mankel, M. Schieber, T. Siegmund, B. Spaan, H. Thurn, D. Topfer, A. Walther & D. Wegener

  3. Physikalisches Institut, Universität, Erlangen, Federal Republic of Germany

    M. Paulini, K. Reim, U. Volland & H. Wegener

  4. II. Institut für Experimentalphysik, Universität, Hamburg, Federal Republic of Germany

    M. Hapke, R. Mundt, T. Oest & W. Schmidt-Parzefall

  5. Institut für Hochenergiephysik, Universität, Heidelberg, Federal Republic of Germany

    W. Funk, J. Stiewe & S. Werner

  6. Max-Planck-Institut für Kernphysik, Heidelberg, Federal Republic of Germany

    S. Ball, J. C. Gabriel, C. Geyer, A. Hölscher, W. Hofmann, B. Holzer, S. Khan, K. T. Knöpfle & J. Spengler

  7. Institute of Particle Physics, Canada

    D. I. Britton, C. E. K. Charlesworth, K. W. Edwards, H. Kapitza, P. Krieger, R. Kutschke, D. B. MacFarlane, R. S. Orr, P. M. Patel, J. D. Prentice, S. C. Seidel, Y. Tsipolitis, E. Tzamariudaki, R. G. Van de Water & T. -S. Yoon

  8. Institut für Experimentelle Kernphysik, Universität, Karlsruhe, Federal Republic of Germany

    D. Reßing, S. Schael, K. R. Schubert, K. Strahl, R. Waldi & S. Weseler

  9. Institut J. Stefan and Oddelek za fiziko, Univerza v Ljubljani, Ljubljana, Slovenia

    B. Boštjančič, G. Kernel, P. Križan, E. Križnič, T. Podobnik & T. Živko

  10. Institute of Physics, University, Lund, Sweden

    H. I. Cronström & L. Jönsson

  11. Institute of Theoretical and Experimental Physics, Moscow, Russia

    V. Balagura, M. Danilov, A. Droutskoy, B. Fominykh, A. Golutvin, I. Gorelov, F. Ratnikov, V. Lubimov, A. Rostovtsev, A. Semenov, S. Semenov, V. Shevchenko, V. Soloshenko, I. Tichomirov & Yu. Zaitsev

  12. University of South Carolina, Columbia, SC, USA

    R. Childers & C. W. Darden

Authors
  1. H. Allrecht
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  2. H. Ehrlichmann
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  3. T. Hamacher
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  4. A. Krüger
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  5. A. Nau
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  6. A. Nippe
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  7. M. Reidenbach
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  8. M. Schäfer
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  9. H. Schröder
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  10. H. D. Schulz
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  11. F. Sefkow
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  12. R. Wurth
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  13. R. D. Appuhn
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  14. C. Hast
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  15. G. Herrera
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  16. H. Kolanoski
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  17. A. Lange
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  18. A. Lindner
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  19. R. Mankel
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  20. M. Schieber
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  21. T. Siegmund
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  22. B. Spaan
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  23. H. Thurn
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  24. D. Topfer
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  25. A. Walther
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  26. D. Wegener
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  27. M. Paulini
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  28. K. Reim
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  29. U. Volland
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  30. H. Wegener
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  31. M. Hapke
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  32. R. Mundt
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  33. T. Oest
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  34. W. Schmidt-Parzefall
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  35. W. Funk
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  36. J. Stiewe
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  37. S. Werner
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  38. S. Ball
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  39. J. C. Gabriel
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  40. C. Geyer
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  41. A. Hölscher
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  42. W. Hofmann
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  43. B. Holzer
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  44. S. Khan
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  45. K. T. Knöpfle
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  46. J. Spengler
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  47. D. I. Britton
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  48. C. E. K. Charlesworth
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  49. K. W. Edwards
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  50. H. Kapitza
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  51. P. Krieger
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  52. R. Kutschke
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  53. D. B. MacFarlane
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  54. R. S. Orr
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  55. P. M. Patel
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  56. J. D. Prentice
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  57. S. C. Seidel
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  58. Y. Tsipolitis
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  59. E. Tzamariudaki
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  60. R. G. Van de Water
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  61. T. -S. Yoon
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  62. D. Reßing
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  63. S. Schael
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  64. K. R. Schubert
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  66. R. Waldi
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  67. S. Weseler
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  68. B. Boštjančič
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  69. G. Kernel
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  70. P. Križan
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  71. E. Križnič
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  72. T. Podobnik
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  73. T. Živko
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  74. H. I. Cronström
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  75. L. Jönsson
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  76. V. Balagura
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  77. M. Danilov
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  78. A. Droutskoy
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  79. B. Fominykh
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  80. A. Golutvin
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  81. I. Gorelov
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  82. F. Ratnikov
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  83. V. Lubimov
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  84. A. Rostovtsev
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  85. A. Semenov
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  86. S. Semenov
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  87. V. Shevchenko
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  88. V. Soloshenko
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  89. I. Tichomirov
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  90. Yu. Zaitsev
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  91. R. Childers
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  92. C. W. Darden
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ARGUS Collaboration

Additional information

Supported by the German Bundesministerium für Forschung und Technologie, Contract no. 054DO51P

Supported by the German Bundesministerium für Forschung und Technologie, contract no. 054ER 12P

Supported by the German Bundesministerium für Forschung und Technologic, contract no. 055HD21P

Supported in part by the Walter C. Summer Foundation

Supported by the Natural Sciences and Engineering Research Council, Canada

Supported by the German Bundesministerium für Forschung und Technologie, contract no. 054KA17P

Supported by the Department of Science and Technology of the Republic of Slovenia and the Internationales Büro KfA, Jülich

Supported by the Swedish Research Council

Supported by the U.S. Department of Energy, under contract DE-AS09-80ER 10690

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ARGUS Collaboration., Allrecht, H., Ehrlichmann, H. et al. Measurement ofR and determination of the charged-particle multiplicity ine + e − annihilation at 13-113-113-1around 10 GeV. Z. Phys. C - Particles and Fields 54, 13–19 (1992). https://doi.org/10.1007/BF01881704

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  • DOI: https://doi.org/10.1007/BF01881704

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