Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Heavy-Ion Collisions and QCD Phases III
HK 23.7: Vortrag
Mittwoch, 18. März 2026, 15:30–15:45, PHIL C 301
Collective effects in O-O and Ne-Ne collisions from a hybrid approach — •Lucas Constantin1, Carl B. Rosenkvist1, Niklas Goetz1, and Hannah Elfner3,1,2,4 — 1Goethe University Frankfurt, Department of Physics, Institute for Theoretical Physics, 60438 Frankfurt, Germany — 2Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany — 3GSI Helmholtzzentrum f*ur Schwerionenforschung, 64291 Darmstadt, Germany — 4Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center, Campus Frankfurt, 60438 Frankfurt am Main, Germany
Many features of heavy-ion collisions are well described by hybrid approaches, where the droplet of strongly coupled quark gluon plasma (QGP) is modeled by hydrodynamics and the subsequent dilute stage is performed with a hadronic transport model. Conventionally, the formation of a QGP is well established in larger collision systems like Lead and Gold. However, hints of collectivity were found even in proton-proton collisions, raising the question where the onset of QGP formation lays. This study aims at making predictions for the light ions run at the LHC in July 2025, in order to explore the applicability of hybrid approaches in smaller collision systems. We employ three different models, the SMASH-vHLLE-hybrid approach, the pure hadronic cascade of SMASH and Angantyr to simulate O-O collisions at a center of mass energy of * sNN=5.36TeV. This setup allows us to compare evolutions with and without a hydrodynamic description on an equal basis, while Angantyr serves as a baseline for no collective effects.
Keywords: Collective Effects; Small Systems; Oxygen; Alpha-Clustering; Anisotropic Flow