Summary

• Large amount of precision high-pT hadron production data after 5 years of operation at RHIC allows to quantitatively address jet physics in QCD

• medium (w/o full jet reco).

• Differential observ. of suppressed hadro-production in central Au+Au provide:

• - stringent constraints on underlying quenching mechanism.

• - direct access to the density & transport properties of QCD medium.

• Are “jet quenching” data due to radiative energy loss in a QGP ?

• Good agreement with calculations on:

  • Leading hadrons: Magnitude, √s, pT, centrality, (light) species dependence
  • Dihadron correlations: disappeareance of away-side azimuthal dijet peak,

• Broadening of near-side pseudo-rapidity correlations.

• Some tests are weak at present:

  • Few details missing in system-size dependence
  • No sharp test of L2 dependence yet.
  • Heavy quark energy loss larger than expected

• New insights of medium properties from new observables (cs via “Mach cone”) ?

• LHC = enormous reach, qualitatively new observ. (full jet reco, jet-jet, jet-g,Z ...)