The legacy of the OPERA experiment on neutrino oscillations
June 10, 2020
The OPERA experiment has conclusively observed the appearance of tau neutrinos in the muon neutrino CNGS beam. High purity samples of $\nu_e$, $\nu_\mu$ and $\nu_\tau$ charged current neutrino interactions, as well as neutral current interactions were isolated.
Recent results obtained using the full dataset to test the three-flavor neutrino oscillation model are discussed. Constraints on the existence of a light sterile neutrino, derived using for the first time tau and electron neutrino appearance channels, are also presented. 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 oscillation parameter values obtained by MiniBooNE are excluded at 3.3 $\sigma$ significance.
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