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Scanning the quark-gluon plasma with charmonium.

B Z Kopeliovich1, A Polleri, J Hüfner

  • 1Max Planck Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany.

Physical Review Letters
|September 5, 2001
PubMed
Summary

We propose studying charmonium production in heavy ion collisions to probe quark-gluon plasma properties. Final state interactions create a minimum at x(F)=0, indicating plasma formation and offering a new sensitive probe.

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Area of Science:

  • Nuclear Physics
  • High-Energy Physics
  • Particle Physics

Background:

  • Heavy ion collisions create a hot, dense medium.
  • Charmonium production is sensitive to medium properties.
  • Understanding the created matter is crucial.

Purpose of the Study:

  • To investigate charmonium production as a probe for quark-gluon plasma.
  • To analyze the dependence of charmonium production on Feynman x(F).
  • To explore final state interactions in heavy ion collisions.

Main Methods:

  • Analyzing charmonium production rates in heavy ion collisions.
  • Examining the variation with Feynman x(F).
  • Comparing predictions at SPS and RHIC energies.

Main Results:

  • A minimum in charmonium production at x(F)=0 is predicted.
  • This minimum is deeper and narrower if quark-gluon plasma is formed.
  • The effect is energy-dependent and influenced by shadowing.

Conclusions:

  • Charmonium production rate variation with x(F) is a novel probe for created matter.
  • Final state interactions significantly impact charmonium production.
  • This probe is complementary to transverse energy dependence and sensitive to final state interactions.

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