Reconstruction of energy spectra of neutrino beams independent of nuclear effects

We propose a new technique that enables an event-by-event selection of neutrino-hydrogen interactions in multinuclear targets and thereby allows application of hydrogen as targets in experiments with neutrino beams without involving cryogenics or high pressure hydrogen gas. This technique could significantly improve the reconstruction of the neutrino energy spectra. Since it allows a separation between hydrogen and the accompanying nuclei, this technique also enables us to measure nuclear effects in neutrino interactions directly.