Multi-detector approach to enhance the sensitivity of neutrino telescopes to low-energy astrophysical sources

TL;DR

This paper discusses strategies to improve neutrino telescope sensitivity to low-energy, GeV-range astrophysical sources by combining multiple detectors, addressing current limitations and exploring new analysis approaches.

Contribution

It introduces and compares multi-detector analysis methods to enhance detection sensitivity for transient GeV neutrino sources.

Findings

Proposed multi-detector analysis approaches.

Enhanced sensitivity to GeV neutrino fluxes.

Identified limitations of current detectors.

Abstract

While large neutrino telescopes have so far mainly focused on the detection of TeV-PeV astrophysical neutrinos, several efforts are ongoing to extend the sensitivity down to the GeV level for transient sources. Only a handful of neutrino searches have been carried out at the moment leaving the signature of astrophysical transients poorly known in this energy range. In this contribution, we discuss the motivations for high-energy neutrino telescopes to explore the GeV energy range and summarize the current limitations of detectors, such as IceCube and KM3NeT. We then present and compare different approaches for multi-detector analyses that may enhance the sensitivity to a transient GeV neutrino flux.