High-pT pi0 suppression in Au+Au collisions at sqrt(sNN) = 200 GeV

Abstract

Neutral pions with pT = 1 - 8 GeV/c have been measured for 9 different centrality classes in Au+Au collisions at sqrt(sNN) = 200 GeV by the PHENIX experiment at RHIC. The pi0 multiplicity in central reactions is significantly below the binary collision scaled yields from both peripheral Au+Au and pp reactions. The observed suppression sets in for the 50-70% centrality class and increases with pT and centrality. For the most central bin, the deficit amounts to a factor ~2.5 at pT ~ 2 GeV/c gradually increasing to a factor ~6 at pT ~ 8 GeV/c.

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