Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 29: Heavy Ion Collisions and QCD Phases VI
HK 29.6: Vortrag
Mittwoch, 29. März 2017, 18:15–18:30, F 1
Flow harmonics in Au-Au collisions at 1.23 AGeV measured with HADES — •Behruz Kardan for the HADES collaboration — Goethe-Universität, Frankfurt am Main
HADES provides a large acceptance combined with a high mass-resolution and therefore allows to study di-electron and hadron production in heavy-ion collisions with unprecedented precision. Due to the high statistics of seven billion Au+Au collisions at 1.23 AGeV collected in 2012, a multi-differential (pt, rapidity and centrality) analysis of collective flow phenomena and as well as a systematic study of higher-order flow harmonics is possible.
Multi-particle azimuthal correlation techniques can be utilized to disentangle the contribution from collective and non-flow process involved in the dynamical evolution of heavy-ion reactions. At low energies directed and elliptic flow has been measured for pions, charged kaons, protons, neutrons and fragments at the BEVALAC and SIS18, but so far high-order harmonics have not been studied. They allow to characterize the properties of the dense hadronic medium produced in these collisions, such as its viscosity, and provide thus an important reference to measurements at higher energies.
Supported by BMBF (05P15RFFCA), HGS-HIRe and H-QM.