1998/09/30 by J. Huefner, J. Hüfner, B. Z. Kopeliovich +1 · 1 citation
Physics and Astronomy · #Environmental science #Gluon #Heavy ion #High-Energy Particle Collisions Research #Ion #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Plasma #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark–gluon plasma #hep-ph #nucl-th
paper · pdf · doi:10.1016/s0370-2693(98)01440-3
published as Phys.Lett. B445 (1998) 223-231 · One figure is added
arxiv created 1998/11/16 · openalex publication_date 1998/12/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In relativistic heavy ion collisions, also the bremsstrahlung of gluons in the fragmentation regions of the nuclei suppresses the produced charmonium states. In the energy range of the SPS, the radiation of semi-hard gluons occurs in the Bethe-Heitler regime and the density of gluons and therefore the suppression goes like (AB)1\over3, where A and B are the nucleon numbers of the projectile and target nuclei. In contrast, the suppression via collisions with nucleons is proportional to (A1\over3 + B1\over3). Parameter free perturbative QCD calculations are in a good agreement with the data on J/Ψ and Ψ' suppression in heavy ion collisions at SPS CERN. At higher energies (RHIC, LHC) the number of gluons which are able to break-up the charmonium substantially decreases and the additional suppression is expected to vanish.