Heidelberg 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 15: Heavy Ion Collisions and QCD Phases 2
HK 15.4: Vortrag
Montag, 23. März 2015, 18:00–18:15, T/HS1
Charged kaon and φ reconstruction in Au+Au-collisions at 1.23 AGeV — •Heidi Schuldes for the HADES collaboration — Goethe-Universität Frankfurt
In Au+Au-collisions at 1.23 AGeV incident energy, strangeness is produced
below the free nucleon-nucleon threshold. In baryon dominated matter K+ and K− mesons exhibit different properties,
because K− can be resonantly absorbed by nucleons.
Although strangeness exchange reactions have been proposed to be the
dominant channel for K− production in this energy regime, the production yield
could also be explained in Ar+KCl-reactions at 1.76 AGeV based on a
statistical hadronization model fit to the measured particle yields. To guarantee strangeness conservation, strangeness is calculated canonically
within Rc in these models, and therefore the ratio of φ/K− is predicted to rise with
decreasing beam energies and as a consequence the feed-down of φ-mesons to kaons becomes important.
In 2012, 7.3 billion Au(1.23 GeV per nucleon)+Au collisions have been recorded by the HADES detector. In this contribution, we present results on charged kaons and φ mesons.
Supported by BMBF (05P12RFGHJ), GSI, HIC for FAIR, HGS-HIRe and H-QM.