# Research and Development for Near Detector Systems Towards Long Term Evolution of Ultra-precise Long-baseline Neutrino Experiments

## TL;DR

This paper discusses the development of near detector systems crucial for reducing uncertainties and enhancing the physics reach of future long-baseline neutrino experiments, emphasizing European contributions.

## Contribution

It highlights the importance of near detector facilities in long-baseline neutrino experiments and discusses European involvement in their development.

## Key findings

- Near detectors help constrain systematic uncertainties.
- They enable precise measurements for neutrino oscillation analysis.
- European contributions are significant in these developments.

## Abstract

With the discovery of non-zero value of $\theta_{13}$ mixing angle, the next generation of long-baseline neutrino (LBN) experiments offers the possibility of obtaining statistically significant samples of muon and electron neutrinos and anti-neutrinos with large oscillation effects. In this document we intend to highlight the importance of Near Detector facilities in LBN experiments to both constrain the systematic uncertainties affecting oscillation analyses but also to perform, thanks to their close location, measurements of broad benefit for LBN physics goals. A strong European contribution to these efforts is possible.