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Hard QCD probes. Motivation (I)
Hard probes: high-pT (jets, prompt ), heavy-quark (D, B, ..).
Early production ( ~ 1/pT< 0.1 fm/c) in parton-parton scatterings with large Q2.
Direct probes of partonic phase(s) Sensitive to dense medium properties:
Incoherent processes: Direct comparison to baseline "vacuum" (pp) data via “collision scaling”:
TAB # of binary inelastic NN colls .
Notes: