High-pT Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC
K. Reygers
Abstract
Transverse momentum spectra for neutral pions have been measured by the WA98 experiment in sqrtsnn=17.3 GeV Pb+Pb collisions at the CERN SPS and by the PHENIX experiment in sqrtsnn=130 GeV Au+Au collisions at RHIC. The neutral pion yields in central collisions for both reaction systems are compared to scaled transverse momentum spectra for nucleon-nucleon reactions at the respective energy. At SPS energies neutral pion production at high pT is enhanced compared to the n+n reference while at RHIC a significant suppression of high-pT neutral pions is observed.
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