Overview

• 1. Introduction:

• • The goal: study Quantum Chromo many-body Dynamics: QGP, CGC.
  • The means: compare hard scattering production in diff. colliding systems.

• 2. “QCD vacuum” production – high pT spectra in p+p:

  • Baseline reference data of hard scattering in free space.

• 3. “Hot QCD medium” production – high pT spectra in central A+A:

  • Light-flavour (u,d,s): Suppressed (compared to free space).
  • ronic (g): Unsuppressed.

• 4. “Cold QCD medium” production – high pT spectra in d+Au:

  •  Light-flavour (u,d,s) production: Enhanced at y ≤ 0 (mid&forward)
  • Suppressed at y ≥ 1 (backwards

• 5. What have we learnt ? Data vs. theory.

• 6. Summary