Bonn 2020 – wissenschaftliches Programm
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HK 24.6: Vortrag
Mittwoch, 1. April 2020, 15:30–15:45, J-HS F
Collective flow measurements with HADES in Au+Au collisions at 1.23 AGeV — •Behruz Kardan — Goethe-Universität, Frankfurt am Main
HADES provides a large acceptance combined with a high mass-resolution and therefore allows to study dielectron, hadron and light nuclei production in heavy-ion collisions with unprecedented precision. The high statistics measurements of flow coefficients for protons and light nuclei including 3He and 4He in Au+Au collisions at 1.23 AGeV are presented here. In addition to the directed (v1) and elliptic (v2) flow components also the higher coefficients v3 and v4 are investigated for the first time in this energy regime. All flow coefficients are studied multi-differential for different centrality classes over a large region of phase space, i.e. as a function of transverse momentum pt and rapidity. We will discuss the scaling properties of the varios flow harmonics as function of pt, rapidity and centrality. This provides the possibility to characterize the production process of light nuclei, i.e. via coalescence, and puts strong constraints on the determination of the properties of dense matter, such as its viscosity and equation-of-state (EOS).
Supported by GSI F&E, HIC for FAIR, HGS-HIRe and H-QM.