We have extended a model for the γN→ππN reaction to virtual photons and selected the diagrams which have a Δ in the final state. The agreement found with the γvp→Δ0π+ and γvp→Δ++π− reactions is good. The sensitivity of the results to NΔ transition form factors is also studied. The present reaction, selecting a particular final state, is an extra test for models of the γvN→ππN amplitude.
Nácher Díez, José Carlos Oset Báguena, Eulogio 2000 Two pion electroproduction Acta Physica Polonica B 31 10-11 2413 2417
