Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Heavy-Ion Collisions and QCD Phases II

HK 5.5: Talk

Monday, March 30, 2020, 17:45–18:00, J-HS G

A relativistic diffusion model from nonequilibrium-statistical considerations — •Johannes Hölck and Georg Wolschin — Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 12/16

A derivation of a Fokker–Planck-type relativistic diffusion model (RDM) from nonequilibrium statistics is considered. The model describes the evolution of centrality-dependent (pseudo-)rapidity distributions of produced charged particles and net protons in relativistic heavy-ion collisions, agreeing with experimental data from RHIC and LHC at various center-of-mass energies.

By separating the system into three subsystems – two fragmentation sources and the central fireball – we account for the different physical processes in and the spatial separation of the three corresponding particle production sources. The drift and diffusion coefficient functions are addressed by considering the expected asymptotic distributions which are used to derive the fluctuation–dissipation relations of the subsystems.