/ Experiment-Nucl arXiv:1005.4916

Transverse momentum dependence of meson suppression $\eta$ suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

Published in: Phys.Rev.
Year: 2010
Vol.: C82
Page No: 011902
Pages: 7

Abstract: New measurements by the PHENIX experiment at RHIC for eta production at midrapidity as a function of transverse momentum (p_T) and collision centrality in sqrt(s_NN) = 200 GeV Au+Au and p+p collisions are presented. They indicate nuclear modification factors (R_AA) that are similar both in magnitude and trend to those found in earlier pi^0 measurements. Linear fits to R_AA in the 5--20 GeV/c p_T region show that the slope is consistent with zero within two standard deviations at all centralities although a slow rise cannot be excluded. Having different statistical and systematic uncertainties the pi^0 and eta measurements are complementary at high p_T/ thus, along with the extended p_T range of these data they can provide additional constraints for theoretical modeling and the extraction of transport properties.

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