High-pT Charged Hadron Suppression in Au+Au Collisions at sqrt(sNN) = 200 GeV
PHENIX Collaboration, S. S. Adler
Abstract
The PHENIX experiment at RHIC has measured charged hadron yields at mid-rapidity over a wide range of transverse momentum (0.5 < pT < 10 GeV/c) in Au+Au collisions at sqrt(sNN)=200 GeV. The data are compared to pizero measurements from the same experiment. For both charged hadrons and neutral pions, the yields per nucleon-nucleon collision are significantly suppressed in central compared to peripheral and nucleon-nucleon collisions. The suppression sets in gradually and increases with increasing centrality of the collisions. Above 4-5 GeV/c in pT, a constant and almost identical suppression of charged hadrons and pizeroes is observed. The pT spectra are compared to published spectra from Au+Au at sqrt(sNN)=130 in terms of xt scaling. Central and peripheral pizero as well as peripheral charged spectra exhibit the same xt scaling as observed in p+p data.
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