# Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

## TL;DR

The OPERA experiment's full dataset analysis confirms neutrino oscillations and constrains sterile neutrino models, excluding significant parameter space suggested by previous experiments with high statistical confidence.

## Contribution

This study is the first to jointly analyze tau and electron neutrino appearance channels to test sterile neutrino hypotheses using the full OPERA dataset.

## Key findings

- Sterile neutrino parameter space is significantly constrained.
- MiniBooNE best-fit points are excluded at 3.3 sigma.
- Neutrino oscillation parameters are precisely measured.

## Abstract

The OPERA experiment has conclusively observed the appearance of tau neutrinos in the muon neutrino CNGS beam. Exploiting the OPERA detector capabilities, it was possible to isolate high purity samples of $\nu_{e}$, $\nu_{\mu}$ and $\nu_{\tau}$ charged current weak neutrino interactions, as well as neutral current weak interactions. In this Letter, the full dataset is used for the first time to test the three-flavor neutrino oscillation model and to derive constraints on the existence of a light sterile neutrino within the framework of the $3+1$ neutrino model. For the first time, tau and electron neutrino appearance channels are jointly used to test the sterile neutrino hypothesis. A significant fraction of the sterile neutrino parameter space allowed by LSND and MiniBooNE experiments is excluded at 90% C.L. In particular, the best-fit values obtained by MiniBooNE combining neutrino and antineutrino data are excluded at 3.3 $\sigma$ significance.