Neutrino interactions with nuclei and long-baseline experiments

The extraction of neutrino mixing parameters and the CP-violating phase from neutrino long-baseline experiments requires knowledge of the neutrino energy. This energy must be reconstructed from the final state of a neutrino-nucleus reaction since all long-baseline experiments use nuclear targets. This reconstruction requires detailed knowledge of the neutrino reactions with bound nucleons and of the final state interactions of hadrons with the nuclear environment. Quantum-kinetic transport theory has been used to build the event generator GiBUU that has been applied to and tested for many different reactions, from heavy-ion collisions to neutrino-nucleus reactions. In this talk I will confront results of GiBUU with results from neutrino experiments. Some examples are also discussed that show the effects of nuclear interactions on observables in long-baseline experiments.