Present Status of Single Pion Production in Neutrino-Nucleus Reactions
  Some of the recent progress in the physics of pion production induced by neutrinos on nucleons and nuclei is reviewed from a theoretical perspective. The importance of Watson's theorem to reconcile ANL and BNL data with the off-diagonal Goldberger-Treiman relation for the $\Delta(1232)$ is discussed. The disagreement between MiniBooNE data and theoretical calculations is presented in the light of the new MINERvA data. The coherent pion production data on $^{12}$C obtained by MINERvA are also compared to different microscopic and PCAC models. 
L. Alvarez-Ruso, E. Hernandez, J. Nieves and M. J. Vicente Vacas
hep-ph hep-ex nucl-th