Microscopic model of the timelike electromagnetic form factor of the nucleon

A microscopic model of the electromagnetic form factor of the nucleon is developed in a hadronic framework, including pions, nucleons and the Δ-resonance explicitly. The spacelike on-shell form factors are reproduced and predictions for the half off-shell dependence are made. The impact of this off-shell dependence in the time like sector (${\mathit{q}}^2$${\mathrm{GeV}}^2$, thus including the region of vector meson dominance) is of main interest in this investigation.