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Related Experiment Videos

J/psi suppression in Pb + Pb collisions: a conventional description.

A K Chaudhuri1

  • 1Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Calcutta-700 064, India. akc@veccal.ernet.in

Physical Review Letters
|June 13, 2002
PubMed
Summary

We analyzed J/psi suppression in lead-lead collisions using NA50 data. Our model accurately describes J/psi suppression and predicts increased suppression at higher energies, aligning with other calculations.

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Area of Science:

  • High Energy Physics
  • Nuclear Physics
  • Quantum Chromodynamics

Background:

  • J/psi suppression in heavy-ion collisions is a key probe of the quark-gluon plasma.
  • Previous studies have analyzed J/psi suppression using various models and experimental data.

Purpose of the Study:

  • To analyze the latest NA50 data on J/psi suppression in lead-lead (Pb + Pb) collisions.
  • To model J/psi production as a two-step process: cc- pair formation and J/psi meson formation.
  • To compare model predictions with experimental data and extend predictions to RHIC energies.

Main Methods:

  • Utilized Quantum Chromodynamics (QCD) to calculate cc- pair formation.
  • Parametrized J/psi meson formation from cc- pairs.
  • Fixed model parameters using experimental data on total J/psi cross-section versus effective nuclear length.

Related Experiment Videos

  • Analyzed the transverse energy (ET) dependence of the J/psi-to-Drell-Yan ratio.

    • Main Results:

    • The model provides an excellent description of the NA50 data for the ET dependence of the J/psi-to-Drell-Yan ratio.
    • The model successfully reproduces J/psi suppression observed in Pb + Pb collisions.
    • Application to RHIC energies predicts significantly larger J/psi suppression.

    Conclusions:

    • The two-step model for J/psi production is validated by NA50 data.
    • The model successfully describes J/psi suppression across different energy regimes.
    • Predictions suggest a more pronounced J/psi suppression at Relativistic Heavy Ion Collider (RHIC) energies.