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Multipole amplitudes of pion photoproduction on nucleons up to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi /><mml:mi mathvariant="normal">GeV</mml:mi></mml:math>using dispersion relations and the unitary isobar model
Two approaches for the analysis of pion photoproduction and electroproduction on nucleons in the resonance energy region are checked at ${Q}^{2}=0$ using the results of the GWU(VPI) partial-wave analysis of photoproduction data. The approaches are based on dispersion relations and the unitary isobar model. Within dispersion relations a good description …