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Dilepton Spectra in Heavy Ion Collisions

  • Jean Letessier
  • Johann Rafelski
  • Ahmed Tounsi
Part of the NATO ASI Series book series (NSSB, volume 346)

Abstract

The theoritical study1, 2 of the deconfined, dense hadronic matter produced in the relativistic collisions has shown that in the present day experiments a relatively high initial value for the light quark-gluon chemical equilibrium temperature is reached, namely T ch = 280 MeV in the S-W/Pb case at 200 GeV A. In the forthcoming Pb-Pb experiments at 160 GeV A we expect still a higher value: T ch = 324 MeV. At pre-chemical equilibrium even higher temperature values should be present — we recall that the production of the strange quark flavor acts to cool the system to the ‘observable’ chemical equilibrium temperature values which are about 50 MeV lower. We believe that these relatively high pre-strangeness temperatures can be observed studying the dilepton invariant mass spectra.

Keywords

Invariant Mass Hadronic Phase Hadron Contribution Transverse Expansion Dilepton Signal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Jean Letessier
    • 1
  • Johann Rafelski
    • 1
    • 2
  • Ahmed Tounsi
    • 1
  1. 1.Laboratoire de Physique Théorique et Hautes EnergiesUniversité Paris 7Paris Cedex 05France
  2. 2.Department of PhysicsUniversity of ArizonaTucsonUSA

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