A combined study of source, detector and matter non-standard neutrino interactions at DUNE

TL;DR

This study assesses how non-standard neutrino interactions at DUNE affect parameter sensitivity, revealing degeneracies and significantly improved bounds on matter interactions through comprehensive statistical analysis.

Contribution

It provides a combined analysis of source, detector, and matter non-standard neutrino interactions at DUNE using MCMC, highlighting degeneracies and improved sensitivities.

Findings

DUNE's sensitivity to standard parameters is reduced by non-standard interactions.

Strong constraints on matter non-standard interactions, up to 15 times better than current bounds.

Degenerate solutions exist in leptonic mixing angle and CP phase.

Abstract

We simultaneously investigate source, detector and matter non-standard neutrino interactions at the proposed DUNE experiment. Our analysis is performed using a Markov Chain Monte Carlo exploring the full parameter space. We find that the sensitivity of DUNE to the standard oscillation parameters is worsened due to the presence of non-standard neutrino interactions. In particular, there are degenerate solutions in the leptonic mixing angle $\theta_{23}$ and the Dirac CP-violating phase $\delta$. We also compute the expected sensitivities at DUNE to the non-standard interaction parameters. We find that the sensitivities to the matter non-standard interaction parameters are substantially stronger than the current bounds (up to a factor of about 15). Furthermore, we discuss correlations between the source/detector and matter non-standard interaction parameters and find a degenerate solution in $\theta_{23}$. Finally, we explore the effect of statistics on our results.