2006/03/23 by K. Werner, Klaus Werner, Werner, Klaus · 1 citation
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #astro-ph #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.hep-ph/0603195
arxiv created 2006/03/23 · openalex publication_date 2006/03/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have demonstrated recently that RHIC heavy ion data concerning particle production at small and intermediate transverse momenta become very transparent, if one realizes that there are two sources of particles production: the corona -- due to the interactions of the peripheral nucleons of either nucleus, and the core -- representing the high density central zone. We extend our analysis to SPS heavy ion data. Again, we find that the nontrivial centrality dependence of particle production (being stronger than at RHIC) is simply due to an increasing corona contribution with decreasing centrality. The core contribution shows no centrality dependence (concerning particle ratios), and can be described in exactly the same way as at RHIC, with one exception: there is somewhat less collective radial flow at SPS compared to RHIC. Apart of this (and a trivial volume effect), the core portions produced in different colliding systems at different energies (RHIC, SPS) look the same.