Initial-state CGC effects

• Initial conditions at RHIC: high-energies + large nuclei

  • Values of small-x: xBj= 2pT/√s <<1
  • High parton (gluon) densities

• Colliding nuclei described with a

• colored highly saturated and

• gluonic wave-function

• (“Color Glass Condensate”):

• Saturation scale:

  • Q2s >> L2QCD  as<<1 (weak coupling)

• "Classical" (Chromo-Dynamics) methods applicable

• Extension to pT > Qs via “geometric scaling”

• Suppression due to reduced # of partonic scattering centers in the initial-state

Notes: