Köln 2025 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 56: Hadron Structure and Spectroscopy VII
HK 56.4: Talk
Thursday, March 13, 2025, 18:15–18:30, HS 3 Physik
Hyperon-production in proton-proton collisions at √s = 3.5 GeV with HADES — •Snehankit Pattnaik1, 2, Johan Messchendorp1, and James Ritman1, 2, 3 for the HADES collaboration — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH — 2Ruhr-Universität Bochum — 3Institut für Kernphysik (IKP) - Forschungszentrum Jülich
This work presents a preliminary analysis of the Λ + KS0 + p + π+ final state in proton-proton scattering using data collected at √s = 3.46 GeV with HADES at GSI in Darmstadt, Germany. Proton-induced hyperon production studies offer valuable insights into baryon spectroscopy, in particular to understand the coupling strengths of intermediate baryons to hyperon final states and to search for new baryon resonances. Hyperon production provides information about the role of N* resonances in strangeness production in NN interactions and in elementary reactions as a reference for understanding many-body systems.
In this talk we will present some of the data-driven analysis procedures, including the use of a kinematic fitter to efficiently select the signal for this exclusive state. Additionally, we discuss the results from an analysis that explores the role of intermediate baryons such as Δ++, Σ*(1385) and mesonic excitations, K* (892). Preliminary results include total and differential cross sections and hints of N* resonances at this energy, building on earlier studies in related channels.
Keywords: Hyperons; Resonances; Strangeness; $\Lambda$; $K^0_S$