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HK: Fachverband Physik der Hadronen und Kerne
HK 69: Heavy-Ion Collisions and QCD Phases XVI
HK 69.6: Talk
Thursday, March 14, 2024, 17:00–17:15, HBR 62: EG 05
Role of initial transverse momentum in a hybrid approach — •Niklas Götz1,2, Lucas Constantin1, and Hannah Elfner3,1,2,4 — 1Goethe University Frankfurt, Department of Physics, Institute for Theoretical Physics, Frankfurt, Germany — 2Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, 60438 Frankfurt am Main, Germany — 3GSI Helmholtzzentrum für Schwerionenforschung, Planckstr. 1, 64291 Darmstadt, Germany — 4Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center, Campus Frankfurt, Max-von-Laue-Straße 12, 60438 Frankfurt am Main, Germany
This work studies the effect of exchanging initial condition models in the modular hybrid approach SMASH-vHLLE, composed of the hadronic transport approach SMASH and the (3+1)d viscous hydrodynamic code vHLLE. The initial condition models investigated are SMASH IC, Trento and IP-Glasma. Correlations are calculated on an event-by-event basis between the eccentricities and momentum anisotropies of the initial state as well as the momentum anisotropies in the final state. This work demonstrates that substantial differences exist both in the distributions of eccentricities, the correlations amongst the initial state properties as well as in the correlations between initial state and final state properties. Inclusion of radial flow in the linear fit improves the prediction of final state flow from initial state properties. The presence of momentum in the initial state has an effect on the emergence of flow and is therefore a relevant part of initial state models, challenging the common understanding of a linear response.
Keywords: relativistic heavy ion collisoins; collective dynamics; hybrid approach; momentum anisotropy; initial condition