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Understanding Jet Quenching and Leading-Particle Suppression in High-Energy Nuclear Collisions

This review article delves into jet quenching and leading-particle suppression phenomena observed in high-energy nucleus-nucleus collisions. The authors discuss the essential physics behind parton energy loss, exploring key mechanisms such as the Landau-Pomeranchuk-Migdal effect and gluon radiation in a nuclear medium. Results from various experiments, including nuclear modification factors at different energies, are analyzed. The implications of energy loss saturation and collective flow effects are discussed, providing insights into the behavior of high-energy partons in a quark-gluon plasma.

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Understanding Jet Quenching and Leading-Particle Suppression in High-Energy Nuclear Collisions

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  1. Jet quenching review I Main Review article; hep-ph/0406201 : Leading-particle suppression in high energy nucleus-nucleus collisions A. Dainese, C. Loizides and G. Paic. Su Houng Lee • Other Main References: • The Landau-Pomeranchuck-Migdal effect in QED, Baier, Dokshitzer, Mueller, Peigne, Schiff (BDMPS), NP B478 (1996) 577 • Radiative energy loss of high energy quarks and gluons in a finite-volume quark gluon plasma, BDMPS, NPB 483 (1997) 291. • 3. Gluon radiation off hard quarks in a nuclear environment: opacity expansion, U. Wiedemann, NPB 588 (2000) 303 • 4. Calculating quenching weights, Salgado, Wiedemann, PRD 68, 014008 (2003)

  2. Ject quenching An important parameter to be understood

  3. Section 2 singer@phya.snu.ac.kr> singer@phya.snu.ac.kr> Parton energy loss and collision goemetry +My personal review

  4. Basics: fast charged particle scattering from scattering centers

  5. The high energy electron scatters successively on ordered scattering centers • 2. As a consequence, the electron momenta are on shell

  6. Basics: fast charged particle radiating from scattering centers

  7. For QCD: Non-abelian nature Two parameters characterizing the medium Characteristic phase for coherent radiation Change of variables typically to

  8. Some famous result for QCD

  9. Section 3 Leading-particle suppression procedure

  10. Actual step I: Factorization formula

  11. Step II: determination of parameters For each parton

  12. Different parameterization

  13. Step III: determination of parameters

  14. Step IV: determination of parameters

  15. Section 4 Results

  16. Nuclear modification factor in Au-Au at 200 GeV - i

  17. Nuclear modification factor in Au-Au at 200 GeV - ii

  18. Nuclear modification factor in Au-Au at 200 GeV - iii

  19. Nuclear modification factor in Au-Au at 200 GeV - iv

  20. Back to back correlation

  21. Azimuthally-differential observables - i Non negligible collective flow effect

  22. Azimuthally-differential observables - ii

  23. Nuclear modification factor in Au-Au at 62.4 GeV - i

  24. Extrapolation to the LHC (5.5 TeV)

  25. Section 5 Discussion

  26. High-energy partons from the surface

  27. High-energy partons from the surface

  28. Energy loss saturation

  29. Section 6 Conclusion

  30. Energy loss saturation

  31. Summary

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