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Production of thef 0(1270) meson in photon-photon collisions

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Zeitschrift für Physik C Particles and Fields

Abstract

The production of thef 0 in two photon collisions, with the subsequent decayf 0→π+π− has been observed in the CELLO detector at PETRA. Thef 0 peak was found to lie on a dipion continuum and to be shifted downwards in mass by ≃50 MeV/c2. The ππ mass spectrum from 0.8 to 1.5 GeV/c2 was well fitted by the model of Mennessier using only a unitarised Born amplitude and helicity 2f 0 amplitude. The previously observed mass shift and distortion of thef 0 peak are explained by strong interference between the Born andf 0 amplitudes. The only free parameter in the fit of the data to the model is the radiative widthΓ γγ(f 0). It was found that:Γ γγ(f 0)=2.5±0.1±0.5 keV where the first (second) quoted errors are statistical (systematic).

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Author information

Author notes

  1. M. J. Schachter

    Present address: SCS, Hamburg, FRG

  2. H. Randoll

    Present address: Blaupunkt, Hildesheim, FRG

  3. G. Schmidt

    Present address: Siemens, München, FRG

  4. U. Kruse

    Present address: University of Illinois, Urbana, USA

  5. H. Lierl & J. H. Field

    Present address: DESY, Hamburg, FRG

  6. A. Snyder

    Present address: Rutgers University, New Brunswick, USA

  7. G. Bonneaud

    Present address: CRN, Strasbourg, France

  8. U. Mallik

    Present address: University of Purdue, Purdue, USA

  9. G. Carnesecchi

    Present address: CRAY Research, Paris, France

Authors and Affiliations

  1. Deutsches Elektronen-Synchrotron, DESY, D-2000, Hamburg, Federal Republic of Germany

    H. J. Behrend, H. Fenner, M. J. Schachter, V. Schröder & H. Sindt

  2. Kernforschungszentrum Karlsruhe and Universität Karlsruhe, D-7500, Karlsruhe, Federal Republic of Germany

    O. Achterberg, G. d'Agostini, W. D. Apel, J. Engler, G. Flügge, B. Forstbauer, D. C. Fries, W. Fues, K. Gamerdinger, Th. Henkes, G. Hopp, M. Krüger, H. Müller, H. Randoll, G. Schmidt & H. Schneider

  3. Max-Planck-Institut für Physik und Astrophysik, D-8000, München, Federal Republic of Germany

    W. de Boer, G. Buschhorn, G. Grindhammer, P. Grosse-Wiesmann, B. Gunderson, C. Kiesling, R. Kotthaus, U. Kruse, H. Lierl, D. Lüers, H. Oberlack, P. Schacht, A. Snyder & W. Wiedenmann

  4. Laboratoire de l'Accélérateur Linéaire, F-91 405, Orsay, France

    G. Bonneaud, P. Colas, A. Cordier, M. Davier, D. Fournier, J. F. Grivaz, J. Haissinski, V. Journé, F. Laplanche, F. Le Diberder, U. Mallik, E. Ros & J. J. Veillet

  5. Laboratoire de Physique Nucléaire et Hautes Energies, University of Paris, F-75230, Paris, France

    J. H. Field, R. George, M. Goldberg, B. Grossetête, O. Hamon, F. Kapusta, F. Kovacs, G. London, R. Pain, L. Poggioli & M. Rivoal

  6. Centre d'Etudes Nucléaires, Saclay, F-91190, Gif-sur-Yvette, France

    R. Aleksan, J. Bouchez, G. Carnesecchi, G. Cozzika, Y. Ducros, A. Gaidot, P. Jarry, Y. Lavagne, J. Pamela, J. P. Pansart & F. Pierre

Authors
  1. H. J. Behrend
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  2. H. Fenner
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  3. M. J. Schachter
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  4. V. Schröder
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  20. G. Schmidt
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  34. A. Snyder
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  36. G. Bonneaud
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  43. V. Journé
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  56. G. London
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  60. R. Aleksan
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  63. G. Cozzika
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  66. P. Jarry
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  68. J. Pamela
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  70. F. Pierre
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CELLO-Collaboration

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On leave of absence from DESY, Hamburg, FRG

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CELLO-Collaboration., Behrend, H.J., Fenner, H. et al. Production of thef 0(1270) meson in photon-photon collisions. Z. Phys. C - Particles and Fields 23, 223–232 (1984). https://doi.org/10.1007/BF01546188

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  • DOI: https://doi.org/10.1007/BF01546188

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