1998/06/17 by Chang‐Hwan Lee, C. -H. Lee, H. Yamagishi +3 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.58.2899
published as Phys.Rev.C58:2899-2906,1998 · 12 pages LaTeX, 11 eps figures
arxiv created 1998/06/17 · openalex publication_date 1998/11/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We extend our early analyses of the dilepton and photon emission rates from a hadronic gas to account for strange mesons using a density expansion. The emission rates are reduced to vacuum correlation functions using three-flavor chiral reduction formulas, and the latter are assessed in terms of empirical data. Using a fire- ball, we compare our results to the low and intermediate mass dilepton data available from CERN. Our results suggest that a baryon free hadronic gas does not account for the excess of low mass dielectrons observed at CERES but does well in accounting for the intermediate dimuons at HELIOS. The same observations apply to the recent low and high pt dielectron rates from CERES.