Speaker
Seungho Han
Description
The NINJA experiment uses an emulsion cloud chamber with water and steel targets exposed to the J-PARC neutrino beam, where nuclear emulsion films provide sub-µm position resolution for charged-particle track measurements. Results from the 2019 physics run, corresponding to an exposure of 4.63×10^{20} protons on target, are presented. Charged-current νμ interactions on water are analyzed, and the kinematics of final-state muons, protons, and pions are reconstructed and compared with predictions from the T2K baseline neutrino–nucleus interaction simulation model. These measurements provide constraints on nuclear effects and final-state interactions relevant for precision neutrino oscillation experiments.