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J/psi suppression in nucleus-nucleus collisions.

Jianwei Qiu1, James P Vary, Xiaofei Zhang

  • 1Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.

Physical Review Letters
|June 13, 2002
PubMed
Summary
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We developed a new model to explain J/psi suppression in high-energy collisions. It accurately predicts suppression data using a single parameter related to energy loss in nuclear matter.

Area of Science:

  • High-energy physics
  • Nuclear physics
  • Particle physics

Background:

  • J/psi suppression is a key phenomenon observed in high-energy collisions.
  • Understanding J/psi suppression provides insights into the properties of nuclear matter.

Purpose of the Study:

  • To propose a novel theoretical model for calculating J/psi suppression.
  • To explain the observed suppression patterns in hadron-nucleus and nucleus-nucleus collisions.

Main Methods:

  • Factorized the J/psi production process into cc- pair production and subsequent meson transition.
  • Modeled the effect of multiple scattering on cc- pair momentum as they exit nuclear matter.
  • Introduced a single parameter representing energy gain per unit length in the nuclear medium.

Related Experiment Videos

Main Results:

  • The model successfully explains J/psi suppression data across various collision types.
  • Demonstrated that multiple scattering transmutes cc- pairs into open charm states.
  • Showcased the predictive power of the model with minimal parameters.

Conclusions:

  • The proposed model offers a consistent explanation for J/psi suppression.
  • Highlights the importance of multiple scattering and energy loss in understanding heavy-ion collisions.
  • Provides a valuable tool for analyzing experimental data in high-energy nuclear physics.