Electromagnetic Currents in Dual Hadrodynamics

We discuss a possible scheme of introducing electromagnetic currents in the dual-resonance model in such a way as to maintain duality in many-photon amplitudes. It turns out that the currents build up a pair of trajectories (Pomeranchukon-like and photon-like) with intercept one. A more specific ansatz for the current vertex gives generalized $\rho$ -dominance form factors and a scaling behavior of the inelastic structure function $\pi$.