Systematics in the global polarization measurements of Λ hyperons with HADES at SIS18

The global polarization of Λ hyperons has been measured in Au+Au and Ag+Ag collisions at √ S NN = 2.4 and 2.55 GeV recorded with HADES. An increase of the polarization is observed following the trend measured by the STAR Collaboration. The high statistics Ag+Ag data allowed for differential measurem...

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Bibliographic Details
Published in:EPJ Web of Conferences 2022, Vol.259, p.11016
Main Author: Kornas, Frédéric Julian
Format: Article
Language:English
Subjects:
Gold
Hyperons
Polarization
Silver
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Summary:The global polarization of Λ hyperons has been measured in Au+Au and Ag+Ag collisions at √ S NN = 2.4 and 2.55 GeV recorded with HADES. An increase of the polarization is observed following the trend measured by the STAR Collaboration. The high statistics Ag+Ag data allowed for differential measurements of the polarization. The study of acceptance effects is very important in the fixed target setup, as the phase-space coverage is not symmetric. These studies are reported together with the evaluation procedure of the systematic uncertainties.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/202225911016