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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Poster

HK 23.37: Poster

Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik

K0s production in p+p collisions at 4.5 GeV beam energy with the HADES experiment — •Chris Takatsch for the HADES collaboration — JLU Gießen, Gießen, Germany

In February 2022 p+p collisions with a kinetic beam energy of 4.5 GeV were recorded with the HADES (High Acceptance DiElectron Spectrometer) experiment at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany. This measurement makes it possible to investigate strangeness production in p+p collisions at low energies and can be taken as a reference measurement for later AA collisions at FAIR. Kaons are the lightest particles that carry strangeness and are therefore ideal to investigate strangeness production at this energy. The K0s primarily decays weakly into pi+ and pi- (off vertex decay) and can be reconstructed with a good significance. Hence the objective of this work is to calculate the multiplicity of K0s in p+p collisions at 4.5 GeV through their decay into two charged pions and compare it with world data. This multiplicity is calculated via a multidifferential analysis of the invariant mass spectra of charged pion pairs in transverse momentum and rapidity.

Keywords: HADES; p+p collision; K0s