Abstract
We give a brief account of the Dyson–Schwinger and Faddeev-equation approach and its application to nucleon resonances and their transition form factors. We compare the three-body with the quark–diquark approach and present a quark–diquark calculation for the low-lying nucleon resonances including scalar, axialvector, pseudoscalar and vector diquarks. We also discuss the timelike structure of transition form factors and highlight the advantages of form factors over helicity amplitudes.
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This article belongs to the special issue “Nucleon Resonances”.
This work is supported by the German Science Foundation DFG under project number DFG TR-16.
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Eichmann, G. Progress in the Calculation of Nucleon Transition form Factors. Few-Body Syst 57, 965–973 (2016). https://doi.org/10.1007/s00601-016-1134-9
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DOI: https://doi.org/10.1007/s00601-016-1134-9