First Results on Nucleon Resonance Electroexcitation Amplitudes from $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$ Cross Sections at $W$ from 1.4-1.7 GeV and $Q^2$ from 2.0-5.0 GeV${}^2$

V. I. Mokeev, P. Achenbach, V. D. Burkert +7

The electroexcitation amplitudes or ${\gamma }_{v}p{N}^{\ast }$ electrocouplings of the $N(1440)1/2^{+}$, $N(1520)3/2^{-}$, and $\Delta (1600)3/2^{+}$ resonances were obtained for the first time from the $ep \t…