Total neutrino and antineutrino nuclear cross sections around 1 GeV

We investigate neutrino–nucleus interactions at energies around 1 GeV. In this regime, the main contributions to the cross sections come from quasi-elastic and Δ production processes. Our formalism, based on the Impulse Approximation is well suited to describe both types of interactions. We focus on a series of important nuclear effects in the interaction of electron neutrinos with 16O, also relevant to future β-beams. Our results show that the Fermi gas model, widely used in data analysis of neutrino experiments, overestimates the total cross sections by as much as 20%.