# Results from the OPERA Experiment

## TL;DR

The OPERA experiment confirmed the appearance of tau neutrinos from muon neutrino beams, providing key measurements of neutrino oscillations and updating searches for sterile neutrinos and electron neutrino appearance.

## Contribution

First direct observation of tau neutrino appearance in a muon neutrino beam, with precise oscillation parameter estimation and updated sterile neutrino search results.

## Key findings

- Detected 5 tau neutrino candidates with 5.1 sigma significance.
- Measured mb3^2 in appearance mode.
- Updated limits on sterile neutrino mixing.

## Abstract

The OPERA experiment reached its main goal by proving the appearance of $\nu_{\tau}$ in the CNGS $\nu_{\mu} $ beam. A sample of five $\nu_{\tau}$ candidates was collected allowing to reject the null hypothesis at $5.1 \sigma$. The estimation of $\Delta m^2_{23}$ in "appearance mode" has been obtained. Updates on the search for $\nu_{\mu} \to \nu_e$ oscillations and on the search for sterile neutrino mixing in the $\nu_{\mu} \to \nu_e$ and $\nu_{\mu} \to \nu_\tau$ channels are also reported.