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Abstract
We report on a functional renormalisation group approach to bound state properties similar to the Dyson-Schwinger–Bethe-Salpether approach. The current approach is set-up for the two-flavour quark-meson model for an illustration of the basic properties. This allows us to access the pion and sigma poles and decay properties. First numerical results are presented and evaluated. We also discuss the next steps.
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Details
1 Institut für Physik, Karl-Franzens-Universität Graz, NAWI Graz, 8010 Graz, Austria
2 Institut für Physik, Karl-Franzens-Universität Graz, NAWI Graz, 8010 Graz, Austria; Brookhaven National Laboratory (BNL) - Department of Physics, P.O. Box 5000, Upton, NY 11973-5000, USA
3 Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany; ExtreMe Matter Institute EMMI, GSI, Planckstr. 1, 64291 Darmstadt, Germany