Neutrino oscillation physics enters the precision era, and neutrino-nucleus interactions modeling constitutes a challenging source of systematic uncertainty for such measurements. A new generation of detectors is being developed to measure the complete (exclusive) final state of particles resulting from neutrino interactions. Relatively new technologies for the field, like the usage of liquid argon Time Projection Chambers (LArTPC) in the SBN program or the highly granular scintillator detector as a target of the upgrade of the T2K near detector, are being deployed. Precise simulations of the nuclear effects on the final-state nucleons are needed to fully benefit from the improved detector capabilities.
To address this problem, we have studied the in-medium propagation of knocked-out protons, i.e., final-state interactions (FSI), comparing the NuWro and INCL cascade models. INCL is a nuclear physics model developed in DPhN, CEA, primarily designed to simulate nucleon-, pion- and light-ion-induced reactions on nuclei. INCL is followed by the de-excitation code ABLA, which emits various particles after the cascade putting the nucleus in the ground state. This study of INCL+ABLA in the framework of neutrino interactions highlights various novelties in the model, including the production of nuclear clusters (e.g., deuterons, alpha particles) in the final state. We present a characterization of the hadronic final state after FSI, comparisons to available measurements of transverse kinematic imbalance, an assessment of the observability of nuclear clusters, and a role of de-excitation on the neutrino interaction modeling.
Indico : https://indico.in2p3.fr/event/29658/