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A measurement of the electronic widths Γ ee of the ϒ(1S), ϒ(2S), and ϒ(4S) resonances, and of the total decay width Γ of the ϒ(4S)

  • Experimental Physics
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Zeitschrift für Physik C Particles and Fields

Abstract

The partial decay width into electrons, Γ ee , of the ϒ(1S) and ϒ(2S) resonances have been measured with the detector ARGUS at thee + e − storage ring DORISII of DESY. Applying the formula of Kuraev and Fadin for the radiative corrections we find: Γ ee (ϒ(1S))= (1.32±0.04±0.03) keV and Γ ee (ϒ(2S))=(0.52±0.03±0.01) keV. The total decay width of the ϒ(4S) resonance and its partial width into electrons have been determined as well. Fitting the data with a generalized Breit-Wigner function with an energy dependent decay width Γ(s) and a mass shift functionm(s), we obtain the following resonance parameters: Γ(M 2)=(10.0±2.8±2.7) MeV, Γ ee =(0.28±0.05±0.01)keV andB ee =(2.77±0.50±0.49)·10−5. We argue that the disagrecment of this result with the world average originates from our more adequate parametrization of the observed ϒ(4S) resonance cross section.

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Author notes

  1. R. Mankel, S. Nowak & M. Walter

    Present address: DESY, IfH Zeuthen, Zeuthen, Germany

  2. P. Krieger, J. D. Prentice, R. G. Van de Water & T. -S. Yoon

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

  3. D. B. MacFarlane, P. R. B. Saull & K. Tzamariudaki

    Present address: McGill University, Montreal, Quebee, Canada AF

Authors and Affiliations

  1. DESY, Hamburg, Germany

    H. Albrecht, T. Hamacher, R. P. Hofmann, T. Kirchhoff, R. Mankel, A. Nau, S. Nowak, D. Reßing, H. Schröder, H. D. Schulz, M. Walter & R. Wurth

  2. Institut für Physik, Universität Dortmund, Germany

    C. Hast, H. Kapitza, H. Kolanoski, A. Kosche, A. Lange, A. Lindner, M. Schieber, T. Siegmund, B. Spaan, H. Thurn, D. Töpfer & D. Wegener

  3. Institut für Kern- und Teilchenphysik, Technische Universität, Dresden, Germany

    P. Eckstein, M. Schmidtler, M. Schramm, K. R. Schubert, R. Schwierz & R. Waldi

  4. Physikalisches Institut, Universität Erlangen-Nürnberg, Germany

    K. Reim & H. Wegener

  5. II. Institut für Experimentalphysik, Universität Hamburg, Germany

    R. Eckmann, H. Kuipers, O. Mai, R. Mundt, T. Oest, R. Reiner & W. Schmidt-Parzefall

  6. Institut für Hochenergiephysik, Universität Heidelberg, Germany

    W. Funk, J. Stiewe & S. Werner

  7. Max-Planck-Institut für Kernphysik, Heidelberg, Germany

    K. Ehret, W. Hofmann, A. Hüpper, K. T. Knöpfle & J. Spengler

  8. Institute of Particle Physics, Canada

    P. Krieger, D. B. MacFarlane, J. D. Prentice, P. R. B. Saull, K. Tzamariudaki, R. G. Van de Water & T. -S. Yoon

  9. Institut für Experimentelle Kernphysik, Universität Karlsruhe, Germany

    C. Frankl, M. Schneider & S. Weseler

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

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

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

    V. Balagura, S. Barsuk, I. Belyaev, R. Chistov, M. Danilov, L. Gershtein, Yu. Gershtein, A. Golutvin, I. Korolko, G. Kostina, D. Litvintsev, P. Pakhlov, S. Semenov, A. Snizhko, I. Tichomirov & Yu. Zaitsev

Authors
  1. H. Albrecht
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  2. T. Hamacher
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  3. R. P. Hofmann
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  4. T. Kirchhoff
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  5. R. Mankel
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  6. A. Nau
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  7. S. Nowak
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  8. D. Reßing
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  9. H. Schröder
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  10. H. D. Schulz
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  11. M. Walter
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  12. R. Wurth
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  13. C. Hast
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  14. H. Kapitza
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  15. H. Kolanoski
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  16. A. Kosche
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  17. A. Lange
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  18. A. Lindner
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  19. M. Schieber
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  20. T. Siegmund
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  21. B. Spaan
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  22. H. Thurn
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  23. D. Töpfer
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  24. D. Wegener
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  25. P. Eckstein
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  26. M. Schmidtler
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  27. M. Schramm
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  28. K. R. Schubert
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  29. R. Schwierz
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  30. R. Waldi
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  31. K. Reim
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  32. H. Wegener
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  33. R. Eckmann
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  34. H. Kuipers
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  35. O. Mai
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  36. R. Mundt
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  37. T. Oest
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  38. R. Reiner
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  39. W. Schmidt-Parzefall
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  40. W. Funk
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  41. J. Stiewe
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  42. S. Werner
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  43. K. Ehret
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  44. W. Hofmann
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  45. A. Hüpper
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  46. K. T. Knöpfle
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  47. J. Spengler
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  48. P. Krieger
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  49. D. B. MacFarlane
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  50. J. D. Prentice
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  51. P. R. B. Saull
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  52. K. Tzamariudaki
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  53. R. G. Van de Water
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  54. T. -S. Yoon
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  55. C. Frankl
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  56. M. Schneider
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  57. S. Weseler
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  58. G. Kernel
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  59. P. Križan
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  60. E. Križnič
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  61. T. Podobnik
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  62. T. Živko
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  63. V. Balagura
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  64. S. Barsuk
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  66. R. Chistov
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  71. I. Korolko
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  72. G. Kostina
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  73. D. Litvintsev
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  74. P. Pakhlov
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  75. S. Semenov
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  76. A. Snizhko
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  77. I. Tichomirov
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  78. Yu. Zaitsev
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Additional information

Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054DO51P

Supported by the German Bundesministerium für Forschung und Technologie, under contract number 056DD11P

Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054ER12P

Supported by the German Bundesministerium für Forschung und Technologie, under contract number 055HD21P

Supported by the Natural Sciences and Engineering Research Council, Canada

Supported by the German Bundesministerium für Forschung und Technologie, under contract number 055KA11P

Supported by the Ministry of Science and Technology of the Republic of Slovenia and the Internationales Büro KfA. Jülich.

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ARGUS Collaboration., Albrecht, H., Hamacher, T. et al. A measurement of the electronic widths Γ ee of the ϒ(1S), ϒ(2S), and ϒ(4S) resonances, and of the total decay width Γ of the ϒ(4S). Z. Phys. C - Particles and Fields 65, 619–625 (1995). https://doi.org/10.1007/BF01578670

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  • DOI: https://doi.org/10.1007/BF01578670

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