2p-2h Cross-Section Systematics in DUNE

TL;DR

This paper investigates the uncertainties in neutrino-nucleus interaction models, focusing on 2p-2h processes, to improve the precision of neutrino oscillation measurements in DUNE.

Contribution

It compares three leading CC 2p-2h models and introduces uncertainty parameters to account for model discrepancies in DUNE analyses.

Findings

Comparison of three CC 2p-2h models

Implementation of uncertainty parameters for model discrepancies

Insights into nuclear effects in neutrino interactions

Abstract

For the operation of precision neutrino experiments, the understanding of neutrino interactions with matter is a preconditioned requirement for all detections and measurements of neutrinos. The largest uncertainties in estimating neutrino-nucleus interaction cross sections arise from the incomplete understanding of nuclear effects. In the study of neutrino oscillations and nuclear scattering processes, obtaining an interaction model with associated uncertainties is of substantial interest for the neutrino physics community. This report presents studies of simulated CC 2p-2h interactions, in which a neutrino interacts with a bound pair of nucleons. This interaction mode is very poorly constrained by current data. A comparison of three leading CC 2p-2h models is presented, along with a number of uncertainty parameters that have been implemented to account for model-to-model discrepancies in the DUNE oscillation analysis.