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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Invited Talks 2

HK 20.2: Hauptvortrag

Dienstag, 24. März 2015, 11:40–12:20, T/HS1

Messungen mit den schwersten Kernen und weitere interessante neue Resultate — •Kirill Lapidus for the HADES collaboration — Physik-Department E12, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Deutschland — Exzellenzcluster Universe, Boltzmannstr. 2, 85748 Garching, Deutschland

HADES is a fixed-target experiment located at the GSI Helmholtzzentrum für Schwerionenforschung and operating at the SIS18 accelerator in the range of beam energies of 1-2 GeV/u for nucleus-nucleus collisions, up to 3.5 GeV in proton-induced reactions. HADES explores properties of the strongly-interacting matter in the regime of high baryonic densities and moderate temperatures, as probed in heavy ion reactions. Besides, proton- and pion-nucleus collisions are studied in order to quantify the effects of cold nuclear matter. Two pillars of the HADES physics programme are di-electron and strangeness measurements. The talk will be devoted to the fresh results harvested by HADES in the recent years. A heavy-ion run with Au+Au collisions at 1.23 GeV/u has been accomplished in 2012 and a number of interesting analyses both in the dilepton and in strange sectors will be discussed. In 2014 HADES measured particles produced in pion-induced reactions, employing light (carbon, polyethylene) and heavy (tungsten) nuclear targets. Of special interest here is the in-medium behaviour of strange hadrons and the physics of nucleon resonances. First results from this beam time will be presented as well. Supported by BMBF 05P12WOGHH and the Excellence Cluster “Universe”.