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Hard QCD probes (I)
Hard probes: High-pT, jets, direct , heavy-quarks (D, B), ...
1. Early production ( ~ 1/pT< 0.1 fm/c) in parton-parton scatterings with large Q2:
Closest experimental probes to underlying QCD (q,g) degrees of freedom.
2. Direct probes of partonic phase(s) Sensitive to QCD medium properties: