Impact of cross-sectional uncertainties on DUNE sensitivity due to nuclear effects

Abstract

In neutrino oscillation experiments precise measurement of neutrino oscillation parameters is of prime importance as well as a challenge. To improve the statistics, presently running and proposed experiments are using heavy nuclear targets. These targets introduce nuclear effects and the quantification of these effects on neutrino oscillation parameters will be decisive in the prediction of neutrino oscillation physics. Limited understanding of neutrino nucleus interactions and inaccurate reconstruction of neutrino energy causes uncertainty in the cross section. The error in the determination of cross section which contributes to systematic error introduces error in the neutrino mixing parameters that are determined by these experiments. In this work we focus on the variation in the predictions of DUNE potential, arising due to systematic uncertainties, using two different event generators-GENIE and GiBUU. These generators have different and independent cross-section models. To check the DUNE potential with the two generators we have checked the sensitivity studies of DUNE for CP violation, mass hierarchy and octant degeneracy. *

Uncertainties in the oscillation parameters measurement due to multi-nucleon effects at NO$ν$A Experiment

“…Since there is no unified framework to describe all the neutrino interactions in the broad energy range, so each generator requires various models and hence different collaborations develop their generators with specific neutrino beam energy spectrum. Due to different interaction models in different generators, the difference in cross-section arises which leads to systematic uncertainties, which is also a major source of uncertainties [64]. A possible solution to these differences in the modeling can be solved using Machine Learning Algorithms (MLA) that uses the multi-algorithm approach to reconstruct the neutrino events [65,66].…”

Quantifying Effects Of Final State Interactions On Pion Production In DUNE Using Monte Carlo Event Generators

“…to determine whether θ 23 falls in the lower octant 0 < θ 23 < π 4 or higher octant π 4 < θ 23 < π 2 . This incapability of an experiment to distinguish between θ 23 and ( π 2 -θ 23 ) is known as octant degeneracy problem [6].…”

Uncertainties Due to Hadronic Production in Final-State Interactions at Long-Baseline Neutrino Facility

“…In addition, the uncertainties in the total neutrino cross-sections which adds systematic uncertainties in the observables [9], the secondary particles that come out of the nucleus after the FSI also count up to systematic errors [10,11]. One of the main reasons is that the nucleons are neither at rest nor noninteracting inside the target nucleus.…”