Speaker
Description
Upcoming neutrino telescopes may soon be able to discover ultra-high-energy (UHE) cosmic
neutrinos, with energies beyond 100 PeV. Finding their sources would provide robust candidates
for the long-sought sources of ultra-high-energy cosmic-rays. We propose to do so by looking for
multiplets of UHE neutrinos in the sky. Focusing on neutrino radio-detection in IceCube-Gen2 as
a benchmark, we determine the multiplet size needed to claim detection of a source. From above
the detector, even a doublet or a triplet suffices to claim a 3σ point source detection after 10
years. The number of identified multiplets significantly constrains the neutrino source population:
the observation of even one point source would exclude most known steady sources as the main
contributor to the diffuse flux, while the observation of no point source would exclude most known
transient sources.
