The KM3NeT collaboration is constructing two underwater neutrino detectors in the Mediterranean Sea: the ARCA (Astroparticle Research with Cosmics in the Abyss) and ORCA (Oscillation Research with Cosmics in the Abyss) detectors. ARCA is located at a depth of 3500m offshore the Sicilian coast of Capo Passero and aims the detection of astrophysical neutrinos in the TeV–PeV range. It will have a volume of about 1 km3 and having an optimal visibility for the Southern sky, it is complementary to IceCube. Moreover, the transparency of the Mediterranean water allows for a very good angular resolution in the reconstruction of neutrino directions of all flavours.
The ORCA detector, at a depth of 2500m offshore the French coasts, has been optimized to detect atmospheric neutrinos in the GeV range for the measurement of the neutrino mass ordering and neutrino oscillation parameters.
The first Detection Units, that are strings hosting the optical sensors, have been already deployed by the KM3NeT collaboration in the French and Italian sites. Results from the first data together with the status and the science perspectives of the KM3NeT project will be presented.
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