Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2001-05-25
Physics
Nuclear Physics
Nuclear Experiment
Proceedings of XXXVI Rencontres de Moriond: QCD, March 17-24, 2001; 5 pages
Scientific paper
The first results from Au-Au collisions at $\sqrt{s_{NN}}$=130 GeV obtained with the PHENIX detector in the Year 2000 run at RHIC are presented. The mid-rapidity charged particle multiplicity and transverse energy per participating nucleon rise steadily with the number of participants, such that transverse energy per charged particle remains relatively constant as a function of centrality. Identified charged hadron spectra as well as $\bar{p}/p$ and $K^+/K^-$ ratios are discussed. Charged particle and neutral pion transverse momentum distributions in peripheral nuclear collisions are consistent with point-like scaling. The spectra at high $p_t$ from central collisions are significantly suppressed when compared to a simple superposition of binary nucleon-nucleon collisions.
Bazilevsky Alexander
for the PHENIX Collaboration
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