High parton density & small-x physics

• Initial conditions at RHIC: High-Energies + Large Nuclei

  • xBj<<1: High parton (gluon) densities
  • Saturation scale: Value of the momentum transfer Q2 at
  • which the parton system starts looking dense to the probe
  • Theoretical interest on highly non-linear QCD regime:
  • Q2s >> L2QCD  as<<1 (weak coupling)
  • "Classical" (Chromo-Dynamics) methods applicable:
  • "Color-Glass-Condensate": Hadron wavefunction described as a state of
  • high-density gluonic (i.e. bosonic and colored) matter, whose distribution is
  • disordered and frozen over the relevant time scales

Notes: