“QGP” models vs. data (I)

• Foreword: Jet quenching is a true prediction of QGP models.

• Magnitude of Au+Au suppression  properties of dense medium:

  • High opacities: <n> = L/≈ 3 – 4
  • Large initial gluon densities: dNg/dy ~ 800-1200
  • Transport coefficients: <q0> ~ 3.5 GeV/fm2
  • Radiative energy losses: dE/dx ≈ 0.25 GeV/fm (expand.) ≈ 14 GeV/fm (static)
• Centrality dependence of Au+Au suppression (detailed comparison of quenching vs Npart needed).
• xT dependence of Au+Au yields  indication of perturbative (hard) mechanisms (modulo baryons in central reactions).
• No suppression in d+Au collisions.

Notes: