Nucleon Resonance Electrocouplings from the CLAS Data on Exclusive Meson   Electroproduction off Protons
  $\gamma_{v}NN^*$ transition helicity amplitudes (electrocouplings) of several prominent excited proton states are determined for the first time in independent analyses of $\pi^+n$, $\pi^0p$, and $\pi^+\pi^-p$ electroproduction off protons. Analysis of $\pi^+\pi^-p$ electroproduction has extended considerably information on electrocouplings of high lying N* states, which decay preferentially to the $N\pi\pi$ final states. 
Victor I. Mokeev, Inna G. Aznauryan, Volker D. Burkert
nucl-ex hep-ex hep-ph