Neutrino Telescope Array (NTA) - Towards Survey of Astronomical $\nu_\tau$ Sources
George W.-S. Hou

TL;DR
The paper discusses the design and potential of the Neutrino Telescope Array (NTA) in Hawaii, which aims to detect astronomical tau neutrinos using Earth-skimming methods with high sensitivity and precision.
Contribution
It introduces the NTA observatory concept, leveraging Earth-skimming tau neutrino detection with stereoscopic Cherenkov-fluorescence observation for the first time at this scale.
Findings
Achieves sensitivities > 100 km³ water equivalent
Pointing accuracy < 0.2 degrees
Almost background-free detection for PeV-EeV neutrinos
Abstract
The Earth-skimming method allows for huge target mass and detection volume simultaneously. In part motivated by IceCube PeV astro-neutrino events, the planned NTA observatory has three site stations watching the air mass surrounded by Mauna Loa, Mauna Kea, and Hualalai on Hawaii Island, plus a site station at the center watching the lower night sky. Sensitivities equivalent to km water and pointing accuracy of can be achieved with Cherenkov-fluorescence stereoscopic observation for PeV-EeV neutrinos that is almost background-free. With design based on experience from Ashra-1 and the goal of clear discovery and identification of astronomical sources, a new international collaboration is being formed.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Radio Astronomy Observations and Technology · Neutrino Physics Research
