Astronomy potential of KM3NeT/ARCA

Abstract

The KM3NeT/ARCA neutrino detector is currently under construction at 3500 m depth offshore Capo Passero, Sicily, in the Mediterranean Sea. The main science objectives are the detection of high-energy cosmic neutrinos and the discovery of their sources. Simulations were conducted for the full KM3NeT/ARCA detector, instrumenting a volume of 1 km${}^3$, to estimate the sensitivity and discovery potential to point-like neutrino sources and an all-sky diffuse neutrino flux. This paper covers the reconstruction of track- and shower-like signatures, as well as the criteria employed for neutrino event selection. By leveraging both the track and shower observation channels, the KM3NeT/ARCA detector demonstrates the capability to detect the diffuse astrophysical neutrino flux within half a year of operation, achieving a 5$\sigma$ statistical significance. With an angular resolution below 0.1${}^{\circ }$ for tracks and under 2${}^{\circ }$ for showers, the sensitivity to point-like neutrino sources surpasses existing observed limits across the entire sky.

20 pages, 30 figures, Published by EPJ-C

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• Super heavy dark matter origin of the PeV neutrino event: KM3-230213A
• Particle acceleration and multi-messenger radiation from Ultra-Luminous X-ray Sources: A new class of Galactic PeVatrons
• Ultrahigh-energy neutrinos as a probe of espresso-shear acceleration in jets of Centaurus A
• VERITAS and multiwavelength observations of the Blazar B3 2247+381 in response to an IceCube neutrino alert
• Comparison of Geometrical Layouts for Next-Generation Large-volume Cherenkov Neutrino Telescopes
• Leptonic and hadronic models of high-energy nebula around V4641 Sgr
• Neutrinos from extreme astrophysical sources
• Large Language Model-driven Analysis of General Coordinates Network (GCN) Circulars
• Probing a cosmogenic origin of astrophysical neutrinos and cosmic rays using gamma-ray observations of TXS 0506+056