Optimization of the selection of fully contained muon neutrino interactions from the Booster Neutrino Beam in the ICARUS T600 detector at Fermilab

The ICARUS T600 LAr-TPC detector has started its new physics runs in June 2022 at Fermilab within the SBN program. This detector is recording neutrino interactions from the Booster BNB neutrino beam in order to definitively clarify the open questions related to the possible existence of sterile neutrinos, as suggested by numerous observed experimental anomalies. In addition the T600 is collecting neutrinos from the NuMI off-axis beam to perform neutrino-Argon cross section measurements. In particular, in order to clarify the anomaly observed by the Neutrino4 reactor neutrino anomaly, ICARUS will search for a possible muon neutrino disappearance in the BNB beam and a for a possible electron neutrino disappearance in the NuMI beam. The focus of this thesis is the study of the muon neutrino fully contained interactions in view of the ICARUS oscillation searches. This study will exploit all the available information provided by all the subdetectors of the T600 (the TPC, the internal PMTs and the external Cosmic Ray Tagging system surrounding the detector) in order to maximize the selection efficiency and minimize the backgrounds, in particular from the cosmic muons that cross randomly the detector during the 1-ms drift time corresponding to the triggered event.