RPA correlations, spectral function and 2p2h (multi-nucleon) effects on charged-current neutrino-nucleus reactions without emitted pions are discussed. We pay attention to the influence of RPA and multi-nucleon mechanisms on the MiniBooNE and MINERvA
flux folded differential cross sections, the MiniBooNE flux unfolded total cross section and the neutrino energy reconstruction.
We discuss some nuclear effects, RPA correlations and 2p2h (multinucleon) mechanisms, on charged-current neutrino-nucleus reactions that do not produce a pion in the final state. We study a wide range of neutrino energies, from few hundreds of MeV up
to 10 GeV. We also examine the influence of 2p2h mechanisms on the neutrino energy reconstruction.
