Physicists Trace 35-Times-Strong Neutrino to 5th-Dimension Black Hole, Challenging Standard Sources
Updated
Updated · Zamin · Oct 4
Physicists Trace 35-Times-Strong Neutrino to 5th-Dimension Black Hole, Challenging Standard Sources
3 articles · Updated · Zamin · Oct 4
Summary
A new Physical Review D paper argues the ultra-high-energy neutrino detected by KM3NeT in 2023 may have come from a primordial black hole exploding in a fifth dimension.
The idea aims to solve a key mismatch in earlier black-hole scenarios: KM3NeT saw the neutrino, but no accompanying photons, which the model says would stay trapped outside our four-dimensional brane.
Researchers tie the mechanism to Hawking evaporation of asteroid-mass primordial black holes and to black holes formed around collapsing cosmic strings, extending earlier estimates that such an object could lie about 2,000 astronomical units away.
Skepticism remains high because a fifth dimension is unproven and IceCube—larger than KM3NeT—has not recorded a comparable event in 15 years.
Future tests may come from radio-based neutrino observatories, including the Greenland project and IceCube-Gen2's planned 500-square-kilometer antenna network.