Effect of the $2p2h$ cross-section uncertainties on an analysis of neutrino oscillations

TL;DR

This paper investigates how uncertainties in the $2p2h$ neutrino-nucleus cross section affect neutrino oscillation analysis, revealing significant impacts especially in the antineutrino channel.

Contribution

It provides a comparative study of two data-driven approaches to quantify the effect of $2p2h$ cross-section uncertainties on oscillation parameters.

Findings

Discrepancies in neutrino cross sections significantly influence oscillation parameter extraction.

Uncertainties have a larger impact in the antineutrino channel.

The study emphasizes the importance of accurate $2p2h$ modeling for neutrino experiments.

Abstract

We report the results of a study aimed at quantifying the impact on the oscillation analysis of the uncertainties associated with the description of the neutrino-nucleus cross section in the two-particle--two-hole sector. The results of our calculations, based on the kinematic method of energy reconstruction and carried out comparing two data-driven approaches, show that the existing discrepancies in the neutrino cross sections have a sizable effect on the extracted oscillation parameters, particularly in the antineutrino channel.