Exclusive Topologies reconstruction in LAr-TPC experiments: a Novel Approach for precise Neutrino-Nucleus Cross-Sections Measurements

The analysis and interpretation of the present and future neutrino oscillation experiments strongly rely on the quantitative understanding of neutrino and antineutrino interactions with nuclei in the "few GeV" energy range. With the advent of the Liquid Argon Time Projection Chamber (LArTPC) experimental techniques for neutrino detection, a novel approach and methodology in neutrino data analysis is now being developed. Purpose of this White Paper is to briefly illustrate this method, as based on real events categorization into experimental exclusive topologies, rather than on MC driven classification of the event rates in terms of interaction channel. Data collected by the ArgoNeuT experiment in the "few-GeV" energy range are extremely helpful to directly probe features of neutrino interactions and associated nuclear effects in the range of interest for future long-baseline neutrino oscillation experiments.