Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Hadronenstruktur und -spektroskopie
HK 17.3: Vortrag
Montag, 4. März 2013, 17:15–17:30, HSZ-204
π0 and η production in proton-induced reactions measured with HADES* — •Malgorzata Gumberidze — Technische Universität Darmstadt — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt
The HADES experiment at GSI studies dielectron radiation as well as strangeness production in various proton, deuteron and heavy-ion induced reactions. In this contribution we will present results from a 4-lepton analysis of 3.5 GeV p+p and p+Nb collisions providing information on π0 and η production. To do so, we exploit the ability of HADES to also detect e+e− pairs from external conversion of real photons, thus allowing for a full reconstruction of the decays π0,η → γ γ → e+e−e+e−. Differential production cross sections will be shown and discussed. We will further demonstrate how these results provide constraints for transport models (e.g. UrQMD, IQMD, HSD, GiBUU) used to interpret the dielectron yields measured by HADES. Note that the method can be applied to heavy-ion reactions as well.
*Work supported by BMBF (06FY9100I and 06FY7114), HIC for FAIR, EMMI, GSI, and HGS-HIRe.