In cosmology, Fermi balls are hypothetical objects that may have been created in the early history of the universe by spontaneous symmetry breaking. One paper has described them as "charged SLAC-bag type structures".[1] Fermi balls can be modeled as a type of non-topological soliton.

The concept is named after Enrico Fermi (see Fermion).

Hypothesized explanations for observed phenomena

Dark matter

A paper by theoretical physicists at Seoul National University has proposed that Fermi balls may be implicated in the formation of primordial black holes from a cosmic first-order phase transition, as a candidate explanation for dark matter.[2]

References

  1. ↑ Macpherson, Alick L.; Pinfold, James L. (1994). "Fermi Ball Detection". arXiv:hep-ph/9412264.
  2. ↑ Kawana, Kiyoharu; Xie, Ke-Pan (2021-05-31). "Primordial black holes from a cosmic phase transition: The collapse of Fermi-balls". arXiv:2106.00111.


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