Speaker
Description
A major challenge for neutrino oscillation experiments, which rely on wide-band fluxes, is the accurate reconstruction of neutrino energy from observed final-state particles. This reconstruction depends on nuclear and interaction models embedded in event generators, which are limited by underlying assumptions and must be constrained by external data. Electron scattering experiments, which use well-characterized monochromatic beams to offer high statistics cross-section measurements, provide a unique opportunity to directly test key aspects of neutrino event generators. The “Electrons for Neutrinos” (e4ν) collaboration presents new pion production measurement on Carbon. The data is compared against commonly used neutrino event generators -GENIE, NEUT, GiBUU and Achilles-. The results highlight the impact of miss-modelling the final state on the neutrino energy reconstruction and offer new constraints for neutrino event generators.