Neutral Pion Suppression at Forward Rapidities in d+Au Collisions at STAR
G. Rakness
Abstract
Measurements of the inclusive yields of pi0 mesons in p+p and d+Au collisions at center of mass energy sqrt(sNN)=200 GeV and pseudorapidity <eta>=4.00 (d beam direction) are reported. The yield for p+p collisions is in general agreement with perturbative QCD calculations. The d+Au yield is in agreement with a calculation which models the Au nucleus as a Color Glass Condensate for forward particle production. The nuclear modification factor derived from the inclusive yields is qualitatively consistent with models which suppress the gluon density in nuclei.
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