- Small cross-section (penetrating) probes -

• 1. Dense QGP ("jet quenching"):

  • Hard-scattering particles suffer a huge energy loss
  • inside the plasma (gluon radiation): 2 GeV/fm ~ 1 MJ/m !!
  • Jet suppression via high pT leading particle spectra:
  • Photons (from p0), ch. hadrons, (g-tagged) jets

• 2. Thermal radiation from QGP:

  • Real and virtual photons convey undistorted info on
  • the thermodyn. state (T) of the medium (Þ EoS)
  • Thermal direct photons g, g* (e+e-, m+m - )
  • Direct photons, electrons &muon pairs

• 3. Deconfinement ("colour screening"):

  • Debye-screening in QGP ("onia" dissociation by hard g)
  • Quarkonia suppression: J/Y, Y', ¡
  • electron & muon pairs

• 4. Open charm & beauty :

  • D, B mesons enhancement:
  • electrons, muons