More results from the OPERA experiment

The OPERA experiment reached its main goal by proving the appearance of v τ in the CNGS v μ beam. Five v τ candidates were detected with a S/B ratio of ∼ 10, allowing to reject the null hypothesis at 5.1σ. The search has been extended by loosening the selection criteria in order to improve the statistical uncertainty. One of the v τ candidates selected with the new strategy shows a double vertex topology and, after a dedicated multivariate analysis, is compatible with being a v Tτ interaction with charm production. Based on the enlarged data sample the estimation of Δm 22 3 in appearance mode is being performed. The search for v e interactions has been extended over the full data set with a more than twofold increase in statistics: data are compatible with the non-oscillation hypothesis in the three-flavour mixing model. The implications of the electron neutrino sample in the framework of the 3+1 sterile mode will lead to exclusion limits on sin 2 2θ μe . Finally, the analysis of the annual modulation of cosmic muons is introduced.