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An experimental study of the processγγ→π + π −

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Zeitschrift für Physik C Particles and Fields

Abstract

Using the CELLO detector, we have measured cross sections for the processγγ→π + π − in the mass range 0.75–1.9 GeV/c2. A partial wave fit to the data indicates the presence of a sizeableS-wave amplitude with signs of resonant behaviour. Values for the γγ width of thef 2(1270) are given, showing the model-dependence of this quantity. At higher dipion masses, the model of Brodsky and Lepage is found to give an order of magnitude description of the data.

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Author information

Author notes

  1. H. Küster

    Present address: Deutsches Elektronen-Synchrotron, DESY, Hamburg, Federal Republic of Germany

  2. J. H. Field

    Present address: Université de Genève, Switzerland

  3. H. Jung & G. Flügge

    Present address: RWTH, Aachen, FRG

  4. M. Feindt, P. Grosse-Wiesmann & W. Wiedenmann

    Present address: CERN, Geneva, Switzerland

  5. J. H. Köhne & W. de Boer

    Present address: Univ. Karlsruhe, FRG

  6. J. Fuster

    Present address: Inst. de Física Corpuscular, Univesidad de Valencia, Spain

  7. K. Gamerdinger

    Present address: MPI für Physik and Astrophysik, München, FRG

  8. H. Kroha

    Present address: Univ. of Rochester, USA

  9. A. Klatchko

    Present address: University of California, Riverside, 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, J. H. Peters, O. Podobrin, V. Schröder & G. G. Winter

  2. University of Glasgow, UK

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

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

    J. Ahme, V. Blobel, M. Feindt, H. Fenner, J. Harjes, J. H. Köhne, H. Spitzer & T. Weihrich

  4. Kernforschungszentrum Karlsruhe und Universität, Karlsruhe, Federal Republic of Germany

    W. -D. Apel, J. Engler, G. Flügge, D. C. Fries, J. Fuster, K. Gamerdinger, P. Grosse-Wiesmann & H. Küster

  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, L. Le Diberder & J. -J. Veillet

  7. Laboratoire de Physique Nucléaire et des Hautes Energies, Universié de 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. H. B. Shooshtari & B. Stella

  9. Centre d'Etudes, Nucléaires, Saclay, France

    G. Cozzika & Y. Ducros

  10. Tel Aviv University, 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. J. H. Peters
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  8. O. Podobrin
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  9. V. Schröder
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  10. G. G. Winter
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  11. P. J. Bussey
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  12. A. J. Campbell
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  13. D. Hendry
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  14. S. J. Lumsdon
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  15. I. O. Skillicorn
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  16. J. Ahme
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  17. V. Blobel
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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. H. Köhne
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  22. H. Spitzer
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  23. T. Weihrich
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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. K. Gamerdinger
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  30. P. Grosse-Wiesmann
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  31. H. Küster
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  32. W. de Boer
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  33. G. Buschhorn
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  34. G. Grindhammer
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  35. B. Gunderson
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  36. C. Kiesling
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  37. R. Kotthaus
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  38. H. Kroha
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  39. D. Lüers
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  40. H. Oberlack
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  41. P. Schacht
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  42. S. Scholz
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  43. W. Wiedenmann
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  44. M. Davier
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  45. J. F. Grivaz
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  46. J. Haissinski
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  47. V. Journé
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  48. L. Le Diberder
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  49. J. -J. Veillet
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  50. K. Blohm
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  51. R. George
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  52. M. Goldberg
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  53. O. Hamon
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  54. F. Kapusta
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  55. L. Poggioli
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  56. M. Rivoal
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  57. G. D'Agostini
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  58. F. Ferrarotto
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  59. M. Iacovacci
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  60. G. H. B. Shooshtari
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  61. B. Stella
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  62. G. Cozzika
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  63. Y. Ducros
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  64. G. Alexander
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  65. A. Beck
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  66. G. Bella
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  67. J. Grunhaus
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  68. A. Klatchko
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  69. A. Levy
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  70. C. Milsténe
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CELLO Collaboration

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CELLO Collaboration., Behrend, H.J., Criegee, L. et al. An experimental study of the processγγ→π + π − . Z. Phys. C - Particles and Fields 56, 381–390 (1992). https://doi.org/10.1007/BF01565945

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  • DOI: https://doi.org/10.1007/BF01565945

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