Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 9: Heavy Ion Collisions and QCD Phases II
HK 9.1: Gruppenbericht
Montag, 26. Februar 2018, 16:30–17:00, HZO 60
Final state hadron chemistry and kinematic distributions in Au+Au collisions at √sNN=2.42 GeV with HADES — •Malgorzata Gumberidze for the HADES collaboration — TU Darmstadt
The matter formed in central heavy-ion collisions at a few GeV per nucleon is commonly understood as resonance matter, a gas of nucleons and excited baryon states with a substantial contribution from mesonic, mostly pionic excitations. Yet, in the initial phase of the reaction the system is compressed to densities several times larger than the normal nuclear matter density density and temperatures of about 80 MeV. At such extreme conditions the fundamental properties of the hadrons are expected to be modified.
The High Acceptance DiElecton Spectrometer (HADES), installed at heavy-ion synchrotron SIS18 at the GSI Helmholtzzentrum für Schwerionenforschung (Germany), is currently the only experiment studying properties of strongly interacting matter in a few A GeV energy regime. It studies 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 yields and spectra of a comprehensive set of hadrons (p, π±, K±, φ, Λ) produced in Au+Au collisions at √s = 2.42 GeV will be presented. The high statistics data allows for studying multi-differential distributions. Experimental spectra will be confronted with results obtained by other experiments as well as with available model calculations.