Estimation of Systematic Uncertainties for the Data Analysis in the Near Detector of the T2K Neutrino Experiment

Abstract

The near detector ND280 is an essential part of the T2K experiment. Its data are used to tune the parameters of the cross-section and flux models, thereby reducing systematic uncertainties and enhancing the precision of neutrino oscillation measurements. ND280 is a complex apparatus consisting of several subdetectors. The structure leads to various sources of systematic uncertainties related to the simulation and tracking of neutrino interaction products. This paper presents the methods used to estimate the systematic errors and to propagate them through the stages towards the final oscillation analysis.