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

TL;DR

This paper examines how multi-nucleon effects and detector efficiencies impact the precision of neutrino oscillation parameter measurements in the NO$ u$A experiment, highlighting increased uncertainties due to these factors.

Contribution

It provides a detailed analysis of the influence of multi-nucleon effects and detector efficiencies on neutrino oscillation measurements, which was not thoroughly explored before.

Findings

Multi-nucleon effects increase measurement uncertainties.

Lower detector efficiency leads to higher uncertainties.

Analysis offers insights for future long-baseline neutrino experiments.

Abstract

In this work, we investigate the role of multi-nucleon (MN) effects (mainly 2p-2h and RPA) on the sensitivity measurement of various neutrino oscillation parameters, in the disappearance channel of NO$\nu$A (USA) experiment. Short-range correlations and detector effects have also been included in the analysis. We use the kinematical method of reconstruction of the incoming neutrino energy, both at the near and far detectors. The extrapolation technique has been used to estimate oscillated events at the far detector. The latest global best fit values of various light neutrino oscillation parameters have been used in the analysis. We find that MN effects increase uncertainty in the measurement of neutrino oscillation parameters, while lower detector efficiency is reflected in more uncertainty. This study can give useful insight into precision studies at long-baseline neutrino experiments in future measurements.