Quantifying multinucleon effect in Argon using high-pressure TPC

Abstract

Different neutrino oscillation experiments use nuclear targets for the study of exotic physics. Nuclear effects are introduced in the experimental environment by the use of these targets and need to be quantified as they add to the systematic errors. In low energy region(around 1 GeV) multinucleon events are present along with QE and Delta interactions. Therefore if these multinucleon events are not incorporated in the data set properly, we end up with an inaccurate reconstruction of neutrino energy. In our work, we have illustrated the importance of incorporation of multinucleon events for the reduction of systematic errors in physics predictions for DUNE. To achieve this we have presented the event distribution ratio of Ar/C, Ar/Ar and C/C as a function of squared four momentum transfer by employing different nuclear models. This analysis recommends the addition of 2p2h or multinucleon events in the event sample and promotes model with RPA effect for the analysis of the event sample to overcome or reduce the systematic uncertainties.