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Study of charm photoproduction mechanisms

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Zeitschrift für Physik C Particles and Fields

Abstract

This paper presents results on charm photoproduction in the energy interval 40 to 160 GeV, obtained from the high-statistics charm samples of the NA 14/2 experiment at CERN. We measure the charm cross-section, the distributions inx F andp T2 and various production ratios and charge asymmetries. The total non-diffractive open-charm cross-section per nucleon is measured to be\(\sigma _{(\gamma N \to c\bar cX)} \) at 〈E γ〉 =100 GeV. We discuss the photoproduction of charm in terms of theoretical and phenomenological models. We compare the measuredp T2 andx F distributions with first-order QCD calculations of photon-gluon fusion and obtain a value for the charm-quark mass ofm c =1.5 −0.1+0.2 GeV/c2.

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Author information

Author notes

  1. F. Calvino

    Present address: ETSEIB-DEN, Univ. Politecnica de Catalunya, Barcelona, Spain

  2. R. Barate

    Present address: Univ. J. Fourier and ISN, Grenoble, France

  3. L. di Ciaccio

    Present address: Univ. di Roma II, ‘Tor Vergata’, Rome, Italy

  4. A. Ferrer

    Present address: IFIC, Univ. de Valencia, Spain

Authors and Affiliations

  1. National Technical University, Athens, Greece

    T. A. Filippas, E. Fokitis, E. N. Gazis, E. C. Katsoufis, A. Maltezos, Th. Papadopoulou & H. Rahmani

  2. Universidad Autónoma de Barcelona, Bellaterra, Spain

    M. P. Alvarez, F. Calvino & J. M. Crespo

  3. CERN, Geneva, Switzerland

    R. Barate, H. Burmeister, L. di Ciaccio, A. Ferrer, Y. Giomataris, M. Koratzinos, A. Lopez, B. Pattison, D. Treille & Y. Zolnierowski

  4. Blackett Lab., Imperial College, London, UK

    M. Burchell, M. Cattaneo, A. Duane, R. W. Forty, G. Hall, M. Koratzinos, C. Seez (Visitor) & D. M. Websdale

  5. LAL, IN2P3-CNRS and Univ. Paris-Sud, Orsay, France

    B. d'Almagne, P. Druet, M. Koratzinos, C. Krafft, A. Lopez, P. Roudeau, J. Six, M. Wayne & G. Wormser

  6. Collège de France, Paris, France

    J. M. Brunet, B. Lefievre, D. Poutot, P. Triscos, G. Tristram & A. Volte

  7. DPhPE, CEN-Saclay, Gif-sur Yvette, France

    P. Bonamy, P. Borgeaud, M. David, Y. Lemoigne, C. Magneville, M. Primout & G. Villet

  8. University of Southampton, UK

    W. K. Lui & J. G. McEwen

  9. CRN, IN2P3-CNRS and Univ. L. Pasteur, Strasburg, France

    D. Bloch, J. P. Engel, P. Foucault, J. P. Gerber & R. Strub

  10. University of Warsaw, Poland

    T. Hofmokl

  11. de Ciencas Fisicas, Univ. Complutense, Madrid, Spain

    A. Lopez

Authors
  1. M. P. Alvarez
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  2. R. Barate
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  3. D. Bloch
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  4. P. Bonamy
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  5. P. Borgeaud
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  6. M. Burchell
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  7. H. Burmeister
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  8. J. M. Brunet
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  9. F. Calvino
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  10. M. Cattaneo
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  11. J. M. Crespo
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  12. B. d'Almagne
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  13. M. David
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  14. L. di Ciaccio
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  15. P. Druet
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  16. A. Duane
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  17. J. P. Engel
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  18. A. Ferrer
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  19. T. A. Filippas
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  20. E. Fokitis
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  21. R. W. Forty
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  22. P. Foucault
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  23. E. N. Gazis
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  24. J. P. Gerber
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  25. Y. Giomataris
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  26. G. Hall
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  27. T. Hofmokl
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  28. E. C. Katsoufis
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  29. M. Koratzinos
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  30. C. Krafft
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  31. B. Lefievre
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  32. Y. Lemoigne
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  33. A. Lopez
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  34. W. K. Lui
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  35. C. Magneville
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  36. A. Maltezos
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  37. J. G. McEwen
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  38. Th. Papadopoulou
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  39. B. Pattison
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  40. D. Poutot
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  41. M. Primout
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  42. H. Rahmani
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  43. P. Roudeau
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  44. C. Seez
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  45. J. Six
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  46. R. Strub
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  47. D. Treille
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  48. P. Triscos
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  49. G. Tristram
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  50. G. Villet
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  51. A. Volte
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  52. M. Wayne
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  53. D. M. Websdale
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  54. G. Wormser
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  55. Y. Zolnierowski
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NA14/2 Collaboration., Alvarez, M.P., Barate, R. et al. Study of charm photoproduction mechanisms. Z. Phys. C - Particles and Fields 60, 53–62 (1993). https://doi.org/10.1007/BF01650430

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  • DOI: https://doi.org/10.1007/BF01650430

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