Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Hadron Structure and Spectroscopy VII

HK 56.4: Vortrag

Donnerstag, 13. März 2025, 18:15–18:30, HS 3 Physik

Hyperon-production in proton-proton collisions at √s = 3.5 GeV with HADES — •Snehankit Pattnaik^{1, 2}, Johan Messchendorp¹, and James Ritman^{1, 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 + K_S⁰ + 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; $\Lambda$; $K^0_S$