Münster 2017 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 47: Heavy Ion Collisions and QCD Phases X
HK 47.4: Talk
Thursday, March 30, 2017, 17:45–18:00, F 1
Deuteron Distributions in Au+Au Collisions at 1.23A GeV — •Max Zuschke for the HADES collaboration — Goethe-Universität Frankfurt
In April 2012, the HADES collaboration collected data on Au+Au collisions at 1.23A GeV.
As light hadrons, such as pions, kaons and protons have successfully been analyzed, ongoing studies try to extend the set of identified particles towards light nuclei in order to improve the statistical model analysis. Here we present results on the measurement of deuterons.
After particle identification, based on a mass determination via time-of-flight and on a measurement of the energy loss in the MDC drift chambers, the transverse mass spectra of the deuteron candidates are extracted. Subsequently, they are corrected for acceptance and efficiency losses, which are determined using a UrQMD simulation, containing embedded deuterons that have passed a full detector simulation, provided by the HGeant framework.
The obtained yields are then compared to blast-wave-fits, in order to extract the radial expansion velocity (β) of the system and its kinetic freeze-out temperature Tkin. The latter one is compared to the chemical freeze-out temperature Tchem as extracted from statistical model fits to hadron yields.
Supported by the German BMBF-grant 05P15RFFCA.