Suppression & Npart scaling ?

• RAA using Npart(/2) in the denominator:

• PHOBOS h± PHENIX p0

• Approx. Npart scaling, RAA~ 1, only for pT> 5 GeV/c ?

• “Cronin enhancement” at ~2 GeV/c ?

• Clear Npart scaling signal in Run-3: RAA = Yield(Au+Au) / [ Npart x Yield(d+Au) ] ≈ 1

Notes: