Centrality dependence of π0 and η production at large transverse momentum in sNN=200GeV d+Au collisions

Abstract

The dependence of transverse momentum spectra of neutral pions and η mesons with pT<16GeV/c and pT<12GeV/c, respectively, on the centrality of the collision has been measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) in d+Au collisions at sNN=200GeV. The measured yields are compared to those in p+p collisions at the same sNN scaled by the number of underlying nucleon-nucleon collisions in d+Au. At all centralities, the yield ratios show no suppression, in contrast to the strong suppression seen for central Au+Au collisions at RHIC. Only a weak pT and centrality dependence can be observed. © 2007 The American Physical Society.