Coherent neutrino scattering

Presented at the 45th Winter School in Theoretical Physics “Neutrino Interactions: From Theory to Monte Carlo Simulations”, Lądek-Zdrój, Poland, February 2–11, 2009.We present a microscopic model for coherent pion production off nuclei induced by neutrinos. This model is built upon a model for single nucleon processes that goes beyond the usual Δ dominance by including non resonant background contributions. We include nuclear medium effects: medium corrections to Δ properties and outgoing pion absorption via an optical potential. This results in major modifications to cross-sections for low energy experiments when compared with phenomenological models like Rein–Sehgal’s