Abstract
The EPOS4 project is an attempt to construct a realistic model for describing relativistic collisions of different systems, from proton-proton (pp) to nucleus-nucleus (AA), at energies from several TeV per nucleon down to several GeV. We argue that a parallel scattering formalism (as in EPOS4) is relevant for primary scatterings in AA collisions above 4 GeV, whereas sequential scattering (cascade) is appropriate below. We present briefly the basic elements of EPOS4, and then investigate heavy ion collisions from 62.4 GeV down to 7.7 GeV, to understand how physics changes with energy, studying in particular the disappearance of the fluid component at low energies. Published by the American Physical Society 2025
Published Version
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