# Sub-GeV Atmospheric Neutrinos and CP-Violation in DUNE

## TL;DR

This paper explores how DUNE's liquid argon detectors can analyze sub-GeV atmospheric neutrinos to measure CP violation independently, with potential to exclude certain CP phase values and impact other neutrino research areas.

## Contribution

It introduces a novel method leveraging DUNE's capabilities to study sub-GeV atmospheric neutrinos for CP violation measurement independent of accelerator data.

## Key findings

- Can exclude several $oldsymbol{ heta_{CP}}$ values beyond 3σ
- Enables determination of sub-GeV atmospheric neutrino flux
- Impacts supernova neutrino detection and dark matter experiments

## Abstract

We propose to use the unique event topology and reconstruction capabilities of liquid argon time projection chambers to study sub-GeV atmospheric neutrinos. The detection of low energy recoiled protons in DUNE allows for a determination of the leptonic $CP$-violating phase independent from the accelerator neutrino measurement. Our findings indicate that this analysis can exclude several values of $\delta_{CP}$ beyond the $3\sigma$ level. Moreover, the determination of the sub-GeV atmospheric neutrino flux will have important consequences in the detection of diffuse supernova neutrinos and in dark matter experiments.