Influence of cross-sectional uncertainty on sensitivity studies of DUNE and T2HK experiments

TL;DR

This paper investigates how uncertainties in neutrino cross-section models affect the sensitivity of DUNE and T2HK experiments in measuring neutrino properties, using three different event generators to analyze the impact.

Contribution

It introduces a comparative analysis of cross-section uncertainties using GENIE, NuWro, and GiBUU for DUNE and T2HK sensitivity studies.

Findings

Cross-section uncertainties significantly impact sensitivity estimates.

Different neutrino event generators yield varying sensitivity results.

Reducing cross-section uncertainties is crucial for accurate neutrino parameter measurements.

Abstract

The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement of neutrino mixing parameters and the confirmation of mass hierarchy. The systematic inaccuracy in the cross-section models introduces inaccuracy in the neutrino mixing parameters estimation. It is important to secure a large decrease of uncertainties, particularly those relating to cross-section, neutrino-nucleus interactions, and neutrino-energy reconstruction, in order to achieve these ambitious goals. In this research article, we use three alternative neutrino event generators, GENIE, NuWro, and GiBUU, to analyze sensitivity studies of T2HK, DUNE, and combined sensitivity of DUNE, and T2HK for mass hierarchy, CP violation, and octant degeneracy caused by cross-section uncertainties. The cross-section models of these generators are separate and independent.