Centrality Dependence of Inclusive Identified Hadrons in PHENIX

2002/06/25 by J. M. Burward-Hoy, Burward-Hoy, J. M.
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Quantum Chromodynamics and Particle Interactions #Stochastic processes and statistical mechanics #nucl-ex

paper · pdf · doi:10.48550/arxiv.nucl-ex/0206016

arxiv created 2002/06/25 · openalex publication_date 2002/06/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Results of identified charged hadrons produced in Au+Au collisions at √s_NN = 130 GeV as a function of centrality are discussed. The of protons and antiprotons is significantly larger than in p--p collisions at the same center of mass energy. Its scaling with the number of participant nucleons, an increase of 20 ± 5% from peripheral to central, may be due to radial expansion. In a hydrodynamical picture a simultaneous fit of pions, kaons and protons is consistent with a radial flow velocity of β_\rmTsurface = 0.72 ± 0.01 and a temperature of T = 122 ± 4 MeV for the 5% most central collisions. Dominant proton yields at p_T > 1.5 GeV/c and antiproton yields at p_T > 1.8 GeV/c may be explained by a combination of suppression of pion yields at high p_T and the boost of low p_T protons to high p_T from radial flow.

Related

• First Results from PHENIX at RHIC
• Production of Charged Pions and Hadrons in Au+Au Collisions at sqrt(s_NN)=130GeV
• Scaling Properties of ϕ-Meson and Light Charged Hadron Production in Small and Large Systems at PHENIX
• Identified Particle Spectra for Au+Au Collisions at √(s) = 200 GeV from STAR, PHENIX and BRAHMS in Comparison to Core-Corona Model Predictions
• Rapidity and centrality dependence of particle production for identified hadrons in Cu+Cu collisions at √s_NN = 200 GeV