2023 Neutrino Signal Tied to Primordial Black Hole From Cosmic Strings in a Fifth Dimension

Physicists propose that the record-breaking 2023 KM3NeT neutrino signal came from the evaporation of a primordial black hole formed by collapsing cosmic strings in a hypothetical fifth dimension. The particle's energy was roughly 30,000 times higher than the Large Hadron Collider can produce.

• The 2023 KM3NeT signal was about 30,000 times more energetic than LHC capabilities
• Theory: primordial black holes form when cosmic strings collapse in a fifth dimension
• Such black holes evaporate on timescales comparable to the age of the universe
• The absence of accompanying photons is explained by gravity in the 'dark' dimension