  We study neutrino-nucleus charged-current reactions on finite nuclei for the
situation in which an outgoing muon and a proton are detected in coincidence,
i.e., we focus on semi-inclusive cross sections. We limit our attention to
one-body current interactions (quasielastic scattering) and assess the impact
of different nuclear effects in the determination of the neutrino energy. We
identify the regions in phase space where the neutrino energy can be
reconstructed relatively well, and study whether the cross section in those
regions is significant. Our results indicate that it is possible to filter more
than 50% of all events according to the muon and proton kinematics, so that for
the DUNE and T2K fluxes the neutrino energy can be determined with an
uncertainty of less than 1% and 3%, respectively. Furthermore, we find that the
reconstructed neutrino energy does not depend strongly on how one treats the
final-state interactions and is not much affected by the description of the
initial state. On the other hand, the estimations of the uncertainty on the
neutrino energy show important sensitivity to the modeling of the initial
state.
