Present Status of Single Pion Production in Neutrino-Nucleus Reactions
Abstract
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 (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 12C obtained by MINERvA are also compared to different microscopic and PCAC models.
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