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Exclusive τ decays with the CELLO detector at PETRA

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Zeitschrift für Physik C Particles and Fields

Abstract

We present high precision results from an analysis of all major τ branching ratios, determined simultaneously in the same experiment. The results are based on 6064 τ decays observed at\(\sqrt s = 35 GeV\), using the CELLO detector at PETRA. The sum of the measured exclusive branching ratios saturates the total τ decay width. In a comparison with the topological branching ratios measured recently by CELLO, the sums of the respective exclusive branching ratios are found to saturate the inclusive fractions. Our results are in good general agreement with existing measurements. However, the decay fractions for τ−→π−π+π− v τ, and π−→π−π0π0 v τ are larger than the present world averages. All measured branching ratios are in good agreement with the expectations from a standard τ lepton.

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Author information

Author notes

  1. J. H. Field

    Present address: Université de Genève, Switzerland

  2. H. Jung & G. Flügge

    Present address: RWTH, Aachen, FRG

  3. J. Fuster

    Present address: Instituto de Física Corpuscular, Universidad de Valencia, Spain

  4. K. Gamerdinger

    Present address: MPI, München

  5. P. Grosse-Wiesmann

    Present address: SLAC, Stanford, USA

Authors and Affiliations

  1. Deutsches Elektronen-Synchrotron, DESY, Hamburg, Federal Republic of Germany

    H. J. Behrend, L. Criegee, J. H. Field, G. Franke, H. Jung, J. Meyer, O. Podobrin, V. Schröder & G. G. Winter

  2. University of Glasgow, Glasgow, UK

    P. J. Bussey, A. J. Campbell, D. Hendry, S. Lumsdon & I. O. Skillicorn

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

    J. Ahme, V. Blobel, W. Brehm, M. Feindt, H. Fenner, J. Harjes, J. Köhne, J. H. Peters & H. Spitzer

  4. Kernforschungszentrum Karlsruhe und Universität, Karlsruhe, Germany

    W. D. Apel, J. Engler, G. Flügge, D. C. Fries, J. Fuster, P. Gabriel, K. Gamerdinger, P. Grosse-Wiesmann, M. Hahn, U. Hädinger, J. Hansmeyer, H. Küster, H. Müller, K. H. Ranitzsch, H. Schneider & R. Seufert

  5. Max-Planck-Institut für Physik und Astrophysik München, Federal Republic of Germany

    W. de Boer, G. Buschhorn, G. Grindhammer, B. Gunderson, C. Kiesling, R. Kotthaus, H. Kroha, D. Lüers, H. Oberlack, P. Schacht, S. Scholz & W. Wiedenmann

  6. Laboratoire de l'Accélérateur Linéaire, Orsay, France

    M. Davier, J. F. Grivaz, J. Haissinski, V. Journé, D. W. Kim, F. Le Diberder & J. J. Veillet

  7. Laboratoire de Physique Nucléaire et Hautes Energies, Université de Paris, Paris, France

    K. Blohm, R. George, M. Goldberg, O. Hamon, F. Kapusta, L. Poggioli & M. Rivoal

  8. University of Rome and INFN, Rome, Italy

    G. d'Agostini, F. Ferrarotto, M. Iacovacci, G. Shooshtari & B. Stella

  9. Centre d'Études Nucléaires, Saclay, France

    G. Cozzika & Y. Ducros

  10. Tel Aviv University, Tel Aviv, Israel

    G. Alexander, A. Beck, G. Bella, J. Grunhaus, A. Klatchko, A. Levy & C. Milsténe

Authors
  1. H. J. Behrend
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  2. L. Criegee
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  3. J. H. Field
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  4. G. Franke
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  5. H. Jung
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  6. J. Meyer
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  7. O. Podobrin
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  8. V. Schröder
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  9. G. G. Winter
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  10. P. J. Bussey
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  11. A. J. Campbell
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  12. D. Hendry
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  13. S. Lumsdon
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  14. I. O. Skillicorn
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  15. J. Ahme
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  16. V. Blobel
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  17. W. Brehm
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  18. M. Feindt
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  19. H. Fenner
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  20. J. Harjes
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  21. J. Köhne
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  22. J. H. Peters
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  23. H. Spitzer
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  24. W. D. Apel
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  25. J. Engler
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  26. G. Flügge
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  27. D. C. Fries
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  28. J. Fuster
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  29. P. Gabriel
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  30. K. Gamerdinger
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  31. P. Grosse-Wiesmann
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  32. M. Hahn
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  33. U. Hädinger
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  34. J. Hansmeyer
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  35. H. Küster
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  36. H. Müller
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  37. K. H. Ranitzsch
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  38. H. Schneider
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  39. R. Seufert
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  40. W. de Boer
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  41. G. Buschhorn
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  42. G. Grindhammer
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  43. B. Gunderson
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  44. C. Kiesling
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  45. R. Kotthaus
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  46. H. Kroha
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  47. D. Lüers
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  48. H. Oberlack
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  49. P. Schacht
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  50. S. Scholz
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  51. W. Wiedenmann
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  52. M. Davier
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  53. J. F. Grivaz
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  54. J. Haissinski
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  55. V. Journé
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  56. D. W. Kim
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  57. F. Le Diberder
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  58. J. J. Veillet
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  59. K. Blohm
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  60. R. George
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  61. M. Goldberg
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  62. O. Hamon
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  63. F. Kapusta
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  64. L. Poggioli
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  65. M. Rivoal
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  66. G. d'Agostini
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  67. F. Ferrarotto
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  68. M. Iacovacci
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  69. G. Shooshtari
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  70. B. Stella
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  71. G. Cozzika
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  72. Y. Ducros
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  73. G. Alexander
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  74. A. Beck
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  75. G. Bella
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  76. J. Grunhaus
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  77. A. Klatchko
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  78. A. Levy
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  79. C. Milsténe
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Consortia

CELLO Collaboration

Additional information

Now at DESY

On leave of absence at SLAC

Heisenberg-Stipendiat der Deutschen Forschungsgemeinschaft

Now at CERN

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CELLO Collaboration., Behrend, H.J., Criegee, L. et al. Exclusive τ decays with the CELLO detector at PETRA. Z. Phys. C - Particles and Fields 46, 537–546 (1990). https://doi.org/10.1007/BF01560254

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  • DOI: https://doi.org/10.1007/BF01560254

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