2025/08/10 by K. Werner, Werner, Klaus
Physics and Astronomy · #High-Energy Particle Collisions Research #X-ray Spectroscopy and Fluorescence Analysis #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2508.07417
EPOS4 is based on a sophisticated (recently significantly improved) parallel-primary-scattering scenario followed by a hydrodynamic expansion, for all collision systems, from small ones such as proton-proton (pp) to big ones such as lead-lead (PbPb). Having already reported on identified particle spectra in recent publications (providing information about radial flow), I discuss here the multiplicity dependence of multi-particle cumulants and flow harmonics, to better understand collectivity in small systems. The model is not particularly tuned for flow results, but it is a "general purpose" approach, trying to accommodate various types of observables with the same model.