2002/08/01 by Rachid Nouicer, Nouicer, Rachid
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0208003
7 pages, 4 figures, 1 table, Latex, to be published in the Proceedings of XXXVIIth Rencontres de Moriond, QCD and High Energy Hadronic Interactions, March 23rd, 2002
arxiv created 2002/08/01 · openalex publication_date 2002/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The first measurements of charged particle pseudorapidity distributions obtained from Au + Au collisions at the maximum RHIC energy sqrt(sNN) = 200 GeV) using the PHOBOS detector are presented. A comparison of the pseudorapidity distributions at energies 130 and 200 GeV for different centrality bins is made, including an estimate of the total number of charged particles. Away from the mid-rapidity region, a comparison between Pb + Pb at SPS energy sqrt(sNN) = 17.3 GeV and Au + Au at RHIC energy sqrt(sNN) = 130 GeV indicates that the extent of the limiting fragmentation region grows by about 1.5 units of eta - ybeam over this energy range. We also observe that the extent of the limiting fragmentation region is independent of centrality at the same energy, but that the particle production per participant in the limiting fragmentation region grows at high eta - ybeam >= -1.5 for more peripheral collisions. In combination with results from lower energies and from barp + p collisions, these data permit a systematic analysis of particle production mechanisms in nucleus-nucleus collisions.