Abstract
Excitation of the nucleon at low Q2 and energies up to several GeV reveals clearly measurable structures that indicate the existance of resonances. A major goal of experiments carried out at the accelerator facility ELSA in Bonn/Germany is to explore this resonance structure, which gives valuable input to models describing the QCD structure of the nucleon. Resonance contributions for nuclear reaction channels, such as single pion, two pion and eta production from the experiments can be given using the Bonn-Gatchina partial wave analysis1. The talk at the conference MESON 2008 in Krakow gave an overview of results from experiments at ELSA and plans for the near future.
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