Common Suppression Pattern of η and π0 Mesons at High Transverse Momentum in Au + Au Collisions at √sNN = 200GeV

Inclusive transverse momentum spectra of η mesons have been measured within pT=2-10 GeV/c at midrapidity by the PHENIX experiment in Au + Au collisions at √sNN = 200GeV. In central Au + Au the η yields are significantly suppressed compared to peripheral Au + Au, d + Au, and p + p yields scaled by the corresponding number of nucleon-nucleon collisions. The magnitude, centrality, and pT dependence of the suppression is common, within errors, for η and π0. The ratio of η to π0 spectra at high pT amounts to 0.40 < Rη/ π0 < 0.48 for the three systems, in agreement with the world average measured in hadronic and nuclear reactions and, at large scaled momentum, in e+e- collisions