This weird particle may have come from a black hole exploding in another dimension
An unexplained high-energy neutrino detected three years ago could be linked to a primordial black hole, perhaps one more even unusual than previously thought
In September 2023, a paper published in Physical Review D proposed an extraordinary explanation for a high-energy neutrino detected by the Cubic Kilometer Neutrino Telescope (KM3NeT) off the coast of Sicily in February 2023. This neutrino, 35 times more energetic than any previously observed, could have been generated by a primordial black hole (PBH) exploding on the outskirts of the solar system.
The PBH in question would have been created from cosmic strings, highly theoretical cracks in spacetime, and potentially residing within a fifth dimension. If true, this would provide a clear explanation for the lack of accompanying photons, as the neutrinos would be the only particles escaping from the extra dimension. However, other scientists remain skeptical, questioning the plausibility of such a scenario based on current evidence.
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