Speaker
Description
KM3NeT is a next-generation research infrastructure housing the large scale neutrino telescopes in the Mediterranean sea. This facility comprises two detectors, KM3NeT/ARCA and KM3NeT/ORCA. These detectors consist of vertically-arranged detection units (230 and 115, respectively), each outfitted with 18 digital optical modules. The photomultipliers in the optical modules detect Cherenkov light induced by charged particles produced by neutrino interactions near the detector. KM3NeT/ARCA is optimized for the search of astrophysical neutrino sources in the range of TeV to PeV; whereas KM3NeT/ORCA is used to study the neutrino oscillation phenomena in the 1-100 GeV energy range.
This talk reports the results obtained from the data collected using various configurations of the KM3NeT/ORCA detector, corresponding to 5% to 15% of the final instrumented volume and 1.5Mton-years exposure. Through the study of the oscillation channel of the electron and muon atmospheric neutrino fluxes into tau neutrinos, a measurement of the normalisation factor, defined as the ratio between the number of observed and expected tau neutrinos, and their charged-current cross-sections are discussed. The event reconstruction, selection and analysis methods and future perspectives are also described.
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