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Freeze-out in relativistic heavy ion collisions at SPS

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Acta Physica Hungarica New Series Heavy Ion Physics

Abstract

The freeze-out conditions in the light (S+S) and heavy (Pb+Pb) colliding systems at 160 AGeV/c are analyzed within the microscopic Quark Gluon String Model (QGSM). Even for the most heavy systems particle emission takes place from the whole space-time domain available for the system evolution, but not from the thin “freeze-out hypersurface”, adopted in fluid dynamical models. Pions are continuously emitted from the whole volume of the reaction and reflect the main trends of the system evolution. Nucleons in Pb+Pb collisions initially come from the surface region. For both reactions there is a separation of the elastic and inelastic freeze-out.

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Authors and Affiliations

  1. Institut für Theoretische Physik der J.W. Goethe Universität, Postfach 111932, D-60054, Frankfurt a.M., Germany

    L. V. Bravina (Alexander von Humboldt Foundation Fellow)

  2. The Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen Ø, Denmark

    I. N. Mishustin & J. Bondorf

  3. The Kurchatov Institute, Russian Scientific Center, 123182, Moscow, Russia

    I. N. Mishustin

  4. Department of Physics, University of Bergen, Allégaten 55, N-5007, Bergen, Norway

    L. P. Csernai

Authors
  1. L. V. Bravina
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  2. I. N. Mishustin
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  3. J. Bondorf
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  4. L. P. Csernai
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Bravina, L.V., Mishustin, I.N., Bondorf, J. et al. Freeze-out in relativistic heavy ion collisions at SPS. APH N.S., Heavy Ion Physics 5, 455–465 (1997). https://doi.org/10.1007/BF03156120

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  • DOI: https://doi.org/10.1007/BF03156120

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