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Regge-pole based descriptions of pion-electroproduction on nucleons havegiven a very good description of the longitudinal components of the crosssections. However, these very same models grossly underestimate the transversecomponents. A related problem appears in QCD-based scaling arguments thatpredict the predominance of longitudinal over transverse electroproduction ofpions by terms $\propto Q^2$. However, data from JLAB, Cornell and DESY,covering a wide kinematical range $1 < Q^2 < 11\, {\rm GeV}^2$ and $2\, {\rmGeV} < W < 4\, {\rm GeV}$, do not show this expected behavior. We address herethis issue of the transverse response in pion-electroproduction by consideringthe contributions of high-lying ($W > 2$ GeV) nucleon resonances to pionproduction. The coupling strengths and form factors are obtained throughresonance-parton duality. We show that in a wide range of electron energies andfour-momentum transfers such a model describes all the available data verywell.

Resonance-Parton Duality in $(e,e'\pi)$ off Nucleons