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Neutral transverse momentum spectra in 60 and 200A·GeV16O+nucleus and proton+nucleus reactions

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Zeitschrift für Physik C Particles and Fields

Abstract

Transverse momentum (p T) distributions fo inclusive photons and neutral pions at midrapidity are measured with a lead glass calorimeter in 60 and are measured with a lead glass calorimeter in 60 and 200A·Gev16O+nucleus and and proton+nucleus reactions. Inclusive photon distributions are compared for central and peripheral reactions. The degree of centrality is determined either from the charged particle multiplicity or from the remaining projectile energy in the forward direction. Deviations from a nucleus+nucleus interaction model based upon linear extrapolation from p+p reactions are observed in central16O+Au data. The variation of theaverage transverse momentum is investigated as function of centrality. The target-mass and energy dependence of π0p T distributions are presented. For16O+Au a change of slope in these distributions is observed atp t≈0.8 GeV/c compatible with hydrodynamic expansion models.

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Author information

Author notes

  1. T. Siemiarczuk

    Present address: Institute of Nuclear Studies, PL-00681, Warsaw, Poland

Authors and Affiliations

  1. Gesellschaft für Schwerionenforschung (GSI), D-6100, Darmstadt, Germany

    R. Albrecht, R. Bock, G. Classon, H. H. Gutbrod, B. W. Kolb, I. Lund (Post Doctoral Fellowship from Swedish Natural Research Science Council), H. R. Schmidt & T. Siemiarczuk

  2. Lawrence Berkeley Laboratory, 94720, Berkeley, CA, USA

    A. Franz, P. Pristiansson, A. M. Poskanzer & H. G. Ritter

  3. University of Lund, S-22 362, Lund, Sweden

    S. Garpman, H. A. Gustafsson, I. Y. Lee, A. Oskarsson, I. Ottrlund, S. Persson & E. Stenlung

  4. University of Münster, D-4400, Münster, Germany

    P. Beckmann, F. Berger, L. Dragon, R. Glasow, K. H. Kampert (Post Doctoral Fellowship from the German Research Community (DFG), H. Löhner, T. Peitzmann, M. Purschke & R. Santo

  5. Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA

    T. C. Awes, C. Baktash, R. L. Ferguson, F. E. Obenshain, F. Plasil, S. P. Sorensen & G. R. Young

  6. University of Tennessee, 37996, Knoxville, TN, USA

    F. E. Obenshain & S. P. Sorensen

Authors
  1. R. Albrecht
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  2. T. C. Awes
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  6. R. Bock
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  7. G. Classon
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  8. L. Dragon
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  9. R. L. Ferguson
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  10. A. Franz
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  14. H. H. Gutbrod
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  15. K. H. Kampert
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  16. B. W. Kolb
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  18. I. Y. Lee
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  19. H. Löhner
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  20. I. Lund
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  21. F. E. Obenshain
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  23. I. Ottrlund
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  27. A. M. Poskanzer
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  30. R. Santo
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  31. H. R. Schmidt
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  32. T. Siemiarczuk
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  33. S. P. Sorensen
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  34. E. Stenlung
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  35. G. R. Young
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WA 80 Collaboration., Albrecht, R., Awes, T.C. et al. Neutral transverse momentum spectra in 60 and 200A·GeV16O+nucleus and proton+nucleus reactions. Z. Phys. C - Particles and Fields 38, 97–103 (1988). https://doi.org/10.1007/BF01574521

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  • DOI: https://doi.org/10.1007/BF01574521

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