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Magnitude of the suppression: medium properties

Data vs. models (pQCD+ non-Abelian parton energy loss) comparison:
- Initial gluon densities:

Opacities:

<n> = L/≈ 3 – 4 [Levai et al.]

Transport coefficients:

Medium-induced radiative
energy losses:

dE/dx ≈ 0.25 GeV/fm (expanding)

dE/dx|eff ≈ 14 GeV/fm (static source) [X.N.Wang]

Very large gluon densities: dNg/dy~1000 consistent w/ measured dNch/dη ~700

All medium properties imply energy densities >> ecrit QCD (assuming thermalizat.)