# Mono-Neutrino at DUNE: New Signals From Neutrinophilic Thermal Dark Matter

## TL;DR

This paper proposes a new mono-neutrino signal at neutrino detectors as a way to detect sub-GeV neutrinophilic dark matter, highlighting DUNE's potential to explore these signals and their thermal origins.

## Contribution

It introduces the concept of mono-neutrino signals for detecting dark matter interacting mainly with neutrinos, and assesses DUNE's capability to probe these signals and their thermal production.

## Key findings

- DUNE can effectively detect mono-neutrino signals from neutrinophilic dark matter.
- Mono-neutrino signals include missing transverse momentum and wrong-sign leptons.
- The proposed signals can reveal the thermal origin of dark matter.

## Abstract

We introduce the mono-neutrino signal at neutrino detectors as a smoking gun of sub-GeV scale dark matter candidates that mainly interact with standard model neutrinos. In a mono-neutrino process, invisible particles, either dark matter themselves or the mediator particle, are radiated off a neutrino when it undergoes the charged-current weak interaction. The associated signals include a missing transverse momentum with respect to the incoming neutrino beam direction and the production of wrong-sign charged leptons. We demonstrate the potential leading role of the future DUNE experiment, using its proposed liquid and gas argon near detectors, in probing these new signals and the thermal origins of neutrinophilic dark matter.