Common suppression pattern of η and π<SUP>0</SUP> mesons at high transverse momentum in Au+Au collisions at √S<SUB>NN</SUB>=200 gev
- Adler, S. S.
- Kapoor, S. S.
- et., al
DOIAbstract
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=200 GeV. 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
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