DUNE potential as a New Physics probe

TL;DR

This paper explores how the DUNE neutrino experiment can serve as a probe for new physics through Non-Standard Interactions, identifying viable models and assessing the detectability of NSI effects.

Contribution

It maps weakly coupled theories capable of inducing detectable NSI in DUNE, providing explicit formulas and a global fit analysis.

Findings

Only models with leptoquarks and neutral isosinglet vector bosons are viable.

NSI smaller than 10^{-2} are challenging to detect even with optimal DUNE data.

Provides explicit matching formulas between models and NSI effects.

Abstract

Neutrino experiments, in the next years, aim to determine with precision all the six parameters of the three-neutrino standard paradigm. The complete success of the experimental program is, nevertheless, attached to the non-existence (or at least smallness) of Non-Standard Interactions (NSI). In this work, anticipating the data taken from long-baseline neutrino experiments, we map all the weakly coupled theories that could induce sizable NSI, with the potential to be determined in these experiments, in particular DUNE. Once present constraints from other experiments are taken into account, in particular charged-lepton flavor violation, we find that only models containing leptoquarks (scalar or vector) and/or neutral isosinglet vector bosons are viable. We provide the explicit matching formulas connecting weakly coupled models and NSI, both in propagation and production. Departing from the weakly coupled completion with masses at TeV scale, we also provide a global fit on all NSI for DUNE, finding that NSI smaller than $10^{-2}$ cannot be probed even in the best-case scenario.