# Distorted Neutrino Oscillations From Ultralight Scalar Dark Matter

## TL;DR

Ultralight scalar dark matter can cause rapid variations in neutrino oscillations, leading to observable distortions in long baseline experiments like DUNE and JUNO, thus providing a new way to probe dark matter properties.

## Contribution

This paper introduces the concept that ultralight scalar dark matter induces fast variations in neutrino oscillations, resulting in detectable signatures at long baseline experiments.

## Key findings

- Current experiments like DUNE and JUNO can detect these oscillation distortions.
- The effect depends on scalar dark matter parameters over a wide mass range.
- Signatures of ultralight scalar dark matter can be distinguished from standard oscillations.

## Abstract

Cold, ultralight ($\ll$ eV) bosonic dark matter with a misalignment abundance can induce temporal variation in the masses and couplings of Standard Model particles. We find that fast variations in neutrino oscillation parameters can lead to significantly distorted neutrino oscillations (DiNOs) and yield striking signatures at long baseline experiments. We study several representative observables to demonstrate this effect and find that current and future experiments including DUNE and JUNO are sensitive to a wide range of viable scalar parameters over many decades in mass reach.