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HK: Fachverband Physik der Hadronen und Kerne
HK 59: Hadronenstruktur und -spektroskopie X
HK 59.1: Group Report
Thursday, March 24, 2011, 16:30–17:00, HS3
Towards a combined analysis of pion- and photon-induced hadronic reactions — •Michael Döring1, Christoph Hanhart2, Fei Huang3, Siegfried Krewald2, Ulf-G. Meissner1,2, and Deborah Rönchen2 — 1Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, Nußallee 14-16, 53115 Bonn — 2Institut für Kernphysik, Institute for Advanced Simulation and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich — 3Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, USA
To allow for a controlled extraction of baryon resonance properties from π N induced reactions, a unified description of various reaction channels is compulsory. For this, a coupled channel approach is used, based on hadron exchange in a Lagrangian-based framework, that respects analyticity, unitarity and gauge invariance. Then, together with the determination of the analytic structure of the scattering amplitude, a precise extraction of resonance parameters such as pole positions and residues becomes possible. New results are presented for the reactions π N→ KY and pion photoproduction.