BEXCO - Room D(109/110)
[NU034] The KM3NeT/ARCA detection capability to a diffuse flux of cosmic neutrinos
The KM3NeT Collaboration started the construction of a research infrastructure hosting the next-generation underwater neutrino observatory in the Mediterranean Sea. Within KM3NeT, the ARCA telescope, currently being constructed at the Italian site, will be devoted to the observation of high-energy cosmic neutrinos both in diffuse and point source mode. The existence of cosmic neutrinos is nowadays well accepted. The IceCube Collaboration has observed cosmic neutrinos in several different analyses, with a flux significantly exceeding the expectations from atmospheric backgrounds. This observation is compatible with an isotropic cosmic flux, equally distributed over the three neutrino flavours. The origin of these cosmic neutrinos is still unknown. The Galactic plane (GP) and in particular sub-regions of the GP near the Galactic Center are regions potentially emitting neutrinos. Being located in the Northern hemisphere the GP is the privileged observation region for KM3NeT/ARCA detector. Moreover, the better pointing accuracy of the ARCA detector with respect to IceCube, both for cascade and tracks, will allow for a better definition of the location in the sky of the cosmic neutrino sources. The discovery flux of the planned ARCA detector, with an instrumented volume of about one km3, has been investigated and the first predictions were reported in the KM3NeT Letter of Intent. Thanks to the use of more sophisticated analysis methods new estimates of the detection capability of the ARCA detector for diffuse flux from full sky and for Galactic Plane regions will be reported.