“Jet quenching” model vs. data (I)

dNg/dy ~ 1100 [Vitev & Gyulassy]

• Opacities:

<n> = L/≈ 3 – 4 [Levai et al.]

• Transport coefficients:

<q 0> ~ 3.5 GeV/fm2 [BDMPS, F.Arleo ]

• Plasma temperatures:

T ~ 0.4 GeV [G. Moore]

• Medium-induced radiative
• energy losses:

dE/dx ≈ 0.25 GeV/fm (expanding)

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

Large opacities imply fast thermalization.

All these values imply energy densities well above ecrit QCD in thermalized syst.