München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 30: Theorie

HK 30.4: Vortrag

Mittwoch, 22. März 2006, 14:45–15:00, B

YN Interaction from the Renormalization Group — •Mathias Wagner¹, Bernd-Jochen Schaefer², Jochen Wambach^1,3, T.T.S. Kuo⁴, and G.E. Brown⁴ — ¹Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt,Germany — ²Institut für Physik, Karl-Franzens-Universität, A-8010 Graz, Austria — ³Gesellschaft für Schwerionenforschung GSI, D-64291 Darmstadt,Germany — ⁴Department of Physics and Astronomy, State University of New York,Stony Brook, NY 11794-3800, USA

In this talk we present recent results of the effective two-body low-momentum potential V_low k for the Hyperon-Nucleon interaction. The potential V_low k is obtained by integrating out the high-momentum components from realistic YN potentials. By demanding T-matrix equivalence, an exact renormalization group flow equation for V_low k can be formulated.

Due to the Λ−Σ coupling an energy-motivated cutoff must be introduced in order to solve the flow equations [1]. Results for the Nijmegen and Jülich potentials are shown. We end with a first preliminary hypernuclei calculation.

[1] B.-J. Schaefer et al., Phys. Rev. C (Rapid Communication) in press, nucl-th/0506065.