Speaker
Dr
Malgorzata Gumberidze
(TU Darmstadt/GSI)
Description
In heavy-ion collisions at few GeV per nucleon, QCD matter with densities several times larger than the normal nuclear matter density and temperatures of about 80 MeV is created. At such extreme conditions the fundamental properties of the hadrons are expected to be modified. Properties of produced QCD matter can be extracted directly from its emissivity in the electromagnetic sector or from the production of rare (multi-) strange particles and them collective flow paterns. In addition the collective motion of final state hadrons reveals important information about both, the properties of the hot and dense medium created in a heavy-ion collision and the collision dynamics.
The High Acceptance DiElecton Spectrometer (HADES), installed at the heavy-ion synchrotron SIS18 at the GSI Helmholtzzentrum für Schwerionenforschung (Darmstadt), is currently the only experiment studying properties of strongly interacting matter in the few A GeV energy regime. HADES is a fixed-target experiment with large angular acceptance and high rate capabilities. It used to study dielectron and hadron production in heavy-ion collisions, as well as in proton- and pion-induced reactions in the energy range of 1 − 4 GeV.
In this contribution the main emphasis will be put on most recent results on strangeness and dielectron production in Au+Au collisions at sqrt(sNN) = 2.42 GeV. The high statistics data allows to study multi-differential distributions. Experimental spectra will be confronted with results obtained by former experiments as well as with available model calculations. The investigation of the the kinetic freeze-out conditions by applying simultaneous blast wave fits to the transverse mass spectra of hadrons will be presented as well.
The future experimental program at SIS18 during FAIR Phase-0 will finally be presented.
Primary author
Dr
Malgorzata Gumberidze
(TU Darmstadt/GSI)
