Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 67: Hadron Structure and Spectroscopy 12

HK 67.4: Vortrag

Donnerstag, 26. März 2015, 18:00–18:15, T/SR25

Hyperon interaction in free space and nuclear matter — •Madhumita Dhar and Horst Lenske — Institute for Theoretical Physics, Justus- Liebig- University Giessen

Baryon-baryon interactions within the SU(3)-octet are investigated in free space and nuclear matter.A meson exchange model based on SU(3) symmetry is used for determining the interaction. The Bethe-Salpeter equations are solved in a 3-D reduction scheme. In-medium effect has been incorporated by including a two particle Pauli projector operator in the scattering equation. The coupling of the various channels of total strangeness S and conserved total charge is studied in detail. Special attention is paid to the physical thresholds. The density dependence of interaction is clearly seen in the variation of the in-medium low-energy parameters. The approach is compared to descriptions derived from chiral-EFT and other meson-exchange models e.g. the Nijmegen and the Juelich model. This work is supported by HIC for FAIR and HGS-HIRe.