Jul 5 – 12, 2017
Venice, Italy
Europe/Zurich timezone
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More results from the OPERA experiment.

Jul 6, 2017, 10:00 AM
Room Casinò (Palazzo del Casinò)

Room Casinò

Palazzo del Casinò

Parallel Talk Neutrino Physics Neutrino physics


Chiara Sirignano (University of Padova & INFN Padova)


The OPERA experiment reached its main goal by proving the appearance of $\nu_\tau$ in the CNGS $\nu_\mu$ beam. A total sample of 5 candidates fulfilling the analysis defined in the proposal was detected with a S/B ratio of about ten allowing to reject the null hypothesis at 5.1 $\sigma$. The search has been extended to $\nu_\tau$-like interactions failing the kinematical analysis defined in the experiment proposal to obtain a statistically enhanced, lower purity, signal sample. One such interesting neutrino interaction with a double vertex topology is reported with a high probability of being a $\nu_\tau$ interaction with charm production. Based on the enlarged data sample the estimation of $\Delta$m$^2_{23}$ in appearance mode is presented. The search for $\nu_e$ interactions has been extended over the full data set with a more than twofold increase in statistics with respect to published data. The analysis of the $\nu_\mu\rightarrow\nu_e$ channel is updated and the implications of the electron neutrino sample in the framework of the 3+1 sterile model is discussed. An analysis of $\nu_\mu\rightarrow\nu_\tau$ interactions in the framework of the sterile neutrino model has also been performed. Finally, the results of the analysis of the annual modulation of the cosmic muon rate is discussed.

Experimental Collaboration OPERA Collaboration

Primary author

Chiara Sirignano (University of Padova & INFN Padova)

Presentation materials