SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Heavy-Ion Collisions and QCD Phases VIII
HK 38.3: Vortrag
Mittwoch, 22. März 2023, 16:15–16:30, SCH/A315
Extending the fluid dynamic description of heavy-ions collisions to times before the collision — •Andreas Kirchner1, Federica Capellino2, Alaric Erschfeld3, Stefan Floerchinger3, and Eduardo Grossi4 — 1ITP Heidelberg — 2University Heidelberg — 3TPI Jena — 4Dipartimento di fisica e astronomia, Universita di Firenze and INFN Sezione di Firenze
It is well established that the late states of a high energy nuclear collision can be described in terms of relativistic fluid dynamics. An open problem in this context is how the actual collision and the early time dynamics directly after it can be described. Phenomenological models are currently employed here and they have several parameters that need to be fitted to experimental data. Using relativistic fluid dynamics of second order we develop a new approach which addresses the entire collision event, and which gets initialized in fact already before the collision. This is based on the droplet model for the incoming nuclei and a state-the-art equation of state including the first-order liquid-gas phase transition. The physics picture we propose assumes that the soft features of a high energy nuclear collision can be fully described through the dynamics of the energy-momentum tensor and other conserved currents.
This work is part of and supported by the DFG Collaborative Research Centre "SFB 1225 (ISOQUANT)".