αs(MZ) and Strangeness Production

  • Johann Rafelski
  • Jean Letessier
  • Ahmed Tounsi

Abstract

Using QCD methods we reevaluate strangeness production in a thermal QGP fireball. Specifically, running QCD renormalization group parameters α s (μ) and m s (μ) are employed1. We resum even-α s Feynman-diagrams involving two particles in initial and final states. In a simple dynamical description of the fireball we use these results to study two generic strangeness observables as function of the impact parameter (baryon content) and collision energy:
  • Specific (with respect to baryon number B) strangeness yield /B

    Once produced strangeness escapes, bound in diverse hadrons, from the evolving fireball and hence the total abundance observed is characteristic for the initial extreme conditions;

  • Phase space occupancy γs

    Strangeness freeze-out conditions at particle hadronization time tf, given the initially produced abundance, determine the final state observable phase space occupancy of strangeness γs(t f ).

Keywords

Strange Quark Perturbative Expansion Strange Particle Strangeness Production Strange Quark Mass 
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 1996

Authors and Affiliations

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

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