Trinity's Sensitivity to Isotropic and Point-Source Neutrinos

TL;DR

Trinity is a proposed air-shower imaging telescope system designed to detect ultra-high-energy neutrinos above 10 PeV, capable of distinguishing astrophysical flux models and sensitive to transient sources.

Contribution

This paper provides updated sensitivity calculations for Trinity, demonstrating its ability to detect and analyze high-energy neutrinos in the overlapping energy range of IceCube.

Findings

Trinity can detect the diffuse astrophysical neutrino flux measured by IceCube.

It can differentiate between various cutoff scenarios of the neutrino flux.

Trinity is sensitive to transient neutrino sources over hours to years.

Abstract

The neutrino band above 10 PeV remains one of the last multi-messenger windows to be opened, a challenge that several groups tackle. One of the proposed instruments is Trinity, a system of air-shower imaging telescopes to detect Earth-skimming neutrinos with energies from $10^6$ GeV to $10^{10}$ GeV. We present updated sensitivity calculations demonstrating Trinity's capability of not only detecting the IceCube measured diffuse astrophysical neutrino flux but doing so in an energy band that overlaps with IceCube's. Trinity will distinguish between different cutoff scenarios of the astrophysical neutrino flux, which will help identify their sources. We also discuss Trinity's sensitivity to transient sources on timescales from hours to years.