Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Heavy Ion Collision and QCD Phases VII

HK 25.3: Vortrag

Dienstag, 15. März 2016, 17:15–17:30, S1/01 A4

Flow harmonics in Au-Au collisions at 1.23 AGeV with HADES — •Behruz Kardan and Christoph Blume for the HADES collaboration — Goethe-Universiät, Frankfurt am Main

HADES provides a large acceptance combined with a high mass-resolution and therefore allows to study dielectron and hadron production in heavy-ion collisions with unprecedented precision. With the high statistics of seven billion Au-Au collisions at 1.23 AGeV recorded in 2012 the investigation of higher-order flow harmonics is possible for the first time at these energies.

Collective flow phenomena are a sensitive probe for the properties of extreme QCD matter. However, their interpretation relies on the understanding of the initial conditions, e.g. the eccentricity of the nuclear overlap region. Based on Glauber Monte Carlo calculations the primordial anisotropic configuration of the colliding nuclei is examined. Event-by-event flow observables and their fluctuations are deduced and compared with measured data. Besides the standard event-plane method, these analyses apply different methods such as Scalar Product, Lee-Yang Zeroes and Cumulants. Furthermore multi-particle azimuthal correlation technique can be utilized to disentangle the contributions from collective and from non-flow processes involved in the dynamical evolution of heavy-ion reactions.

Supported by BMBF (05P15RFFCA), HGS-HIRe, H-QM, GSI and HIC for FAIR.