# Resolving the atmospheric octant by an improved measurement of the reactor angle

## TL;DR

This paper forecasts how future long baseline neutrino experiments like DUNE and T2HK can resolve the atmospheric octant puzzle, emphasizing the importance of precise reactor angle measurements in determining the atmospheric angle's octant.

## Contribution

It highlights the critical role of improved reactor angle measurements in resolving the atmospheric octant ambiguity in upcoming neutrino experiments.

## Key findings

- Precise measurement of $ heta_{13}$ is crucial for octant determination.
- Future experiments can effectively resolve the atmospheric octant puzzle.
- Global neutrino data supports the potential of DUNE and T2HK in this effort.

## Abstract

Taking into account the current global information on neutrino oscillation parameters we forecast the capabilities of future long baseline experiments such as DUNE and T2HK in settling the atmospheric octant puzzle. We find that a good measurement of the reactor angle $\theta_{13}$ plays a key role in fixing the octant of the atmospheric angle $\theta_{23}$ with such future accelerator neutrino studies.