Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 43: Hadronenstruktur und -spektroskopie VIII

HK 43.5: Talk

Wednesday, March 23, 2011, 17:30–17:45, HS3

Strange Baryons Below The KN Threshold — •Eliane Epple — Excellence Cluster “Universe”, TU München, Boltzmannstr. 2, 85748 Garching, Germany

A detailed analysis of strange baryon resonances, reconstructed with the High Acceptance Di-Electron Spectrometer (HADES), in proton-proton collisions will be presented.

The talk focuses on the results of the Λ(1405) and Σ(1385) reconstruction in a p+p reaction with a kinetic beam energy of 3.5 GeV. The investigation of differential cross sections and resonance line shapes can deliver information about the production mechanism and the inner structure of these resonances [1,2]. Especially interesting is an insight into the inner structure of the Λ(1405), which is treated as a dynamically generated resonance with the main contributing channels Σπ and KN. Since the pole mass of this resonance is just below the KN threshold its behaviour depends sensitively on the relative strength of these two channels and their coupling to the production mechanism. To extract these information from the Λ(1405) a rich database in production and decay channels is needed, as provided by the HADES data.
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T. Hyodo et al., Mod. Phys. Lett. A23 (2008) 2393.