1998/02/11 by Dinesh Kumar Srivastava, Dinesh K. Srivastava, K. Geiger +1 · 4 citations
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.58.1734
published as Phys.Rev.C58:1734-1737,1998 · 4 pages including 3 postscript figures
arxiv created 1998/02/11 · openalex publication_date 1998/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The dynamics of partonic cascades may be an important aspect for particle production in relativistic collisions of nuclei at CERN SPS and BNL RHIC energies. Within the parton-cascade model, we estimate the production of single photons from such cascades due to the scattering of quarks and gluons q\stackrel\ensuremath→gq\ensuremathγ, quark-antiquark annihilation qq\ensuremath→g\ensuremathγ or \ensuremathγ\ensuremathγ, and electromagnetic bremsstrahlung of quarks \stackrel\ensuremath→qq\ensuremathγ. We find that the latter QED branching process plays the dominant role for photon production, similarly as the QCD branchings \stackrel\ensuremath→qqg and \stackrel\ensuremath→ggg play a crucial role for parton multiplication. We conclude therefore that photons accompanying the parton-cascade evolution during the early stage of heavy-ion collisions shed light on the formation of a partonic plasma.