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astro-ph.HE2026
Primordial high energy neutrinos
Nicolas Grimbaum Yamamoto
Among the few ways to probe the early Universe, neutrinos offer a particular window on high energy phenomena occurring before recombination. We discuss the opportunities of observi…
astro-ph.HE2026
The KM3NeT event: a primordial high energy neutrino?
Nicolas Grimbaum Yamamoto, Thomas Hambye
High energy neutrinos can be injected in the early Universe from the decay or annihilation of long lived primordial relics. We analyse the possibility that the ultrahigh energy neu…