Unitarity, analyticity and duality constraints in η and π photoproduction
1 Institut für Kernphysik, Johannes Gutenberg-Universität, Mainz, Germany
2 PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, Mainz, Germany
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Published online: 1 February 2019
We report an update of the isobar model EtaMAID. A new approach is proposed to avoid double counting in the overlap region of Regge and resonances. Dispersion relation is applied on top of the isobar model, and both models describe the data equally well. Application of these ideas to pion photoproduction is discussed.
© The Authors, published by EDP Sciences, 2019
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