# Neutrino Topology Reconstruction at DUNE and Applications to Searches for Dark Matter Annihilation in the Sun

## TL;DR

This paper introduces a new neutrino energy and topology reconstruction method at DUNE that leverages directional information to improve energy resolution and enhance dark matter search sensitivity.

## Contribution

The paper presents a novel reconstruction technique using directional data, improving energy measurement and background rejection in neutrino detection at DUNE.

## Key findings

- Energy resolution comparable to existing methods.
- Directional information enhances background rejection.
- Method improves sensitivity to dark matter annihilation signals.

## Abstract

We consider a new technique for neutrino energy and topology reconstruction at DUNE. In particular, we show that when the direction of the incoming neutrino is known, one can use the measured directions of the outgoing leptonic and hadronic particles to reconstruct poorly-measured quantities, such as the hadronic cascade energy. We show that this alternative technique yields an energy resolution which is comparable to current reconstruction methods which sum measured energies. As a proof of concept we apply this new reconstruction method to a search for dark matter annihilation in the Sun. We show that the use of directional information from both the leptonic and hadronic interaction products allows one to effectively reject backgrounds and isolate the signal, giving competitive sensitivities.