Probing Source and Detector NSI parameters at the DUNE Near Detector

TL;DR

This paper demonstrates that the DUNE Near Detector can significantly improve constraints on neutrino Non Standard Interaction parameters, surpassing previous bounds and providing a clean environment for studying source and detector NSI effects.

Contribution

It provides the first detailed analysis of DUNE ND's potential to constrain source and detector NSI parameters, offering new bounds and insights into systematic error impacts.

Findings

DUNE ND can reject large NSI parameter regions allowed by Far Detector data.

It sets the most stringent accelerator bounds on certain NSI parameters.

The environment is ideal for studying source and detector NSI with reduced systematic uncertainties.

Abstract

We investigate the capability of the DUNE Near Detector (ND) to constrain Non Standard Interaction parameters (NSI) describing the production of neutrinos ($\varepsilon_{\alpha\beta}^s$) and their detection ($\varepsilon_{\alpha\beta}^d$). We show that the DUNE ND is able to reject a large portion of the parameter space allowed by DUNE Far Detector analyses and to set the most stringent bounds from accelerator neutrino experiments on $|\varepsilon_{\mu e}^{s,d}|$ for wide intervals of the related phases. We also provide simple analytic understanding of our results as well as a numerical study of their dependence on the systematic errors, showing that the DUNE ND offers a clean environment where to study source and detector NSI.