Pion Electroproduction and Siegert’s Theorem

Nucleon to Resonance transition form factors are discussed within the MAID model for pion electroproduction on the nucleon. For low Q 2 the consequences of Siegert’s theorem are presented and medium to large violations of the Long Wavelength Limit at the pseudo-threshold are observed for the phenomenological parametrizations of the longitudinal transition form factors of different nucleon resonances.