4.4 Article

Q-monopole-ball: a topological and nontopological soliton

Journal

JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 1, Pages -

Publisher

SPRINGER
DOI: 10.1007/JHEP01(2022)109

Keywords

Beyond Standard Model; Solitons Monopoles and Instantons

Funding

  1. U.S. Department of Energy [DESC-0017647]
  2. Israel Science Foundation [1302/19]
  3. Arthur B. McDonald Canadian Astroparticle Physics Research Institute

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Magnetic monopoles and Q-balls are examples of topological and nontopological solitons. A new soliton state called Q-monopole-ball, which has both topological and nontopological charges, has been discovered in a monopole sector. Stable Q-monopole-balls can contain large magnetic charges and may explain the existence of dark matter.
Magnetic monopoles and Q-balls are examples of topological and nontopological solitons, respectively. A new soliton state with both topological and nontopological charges is shown to also exist, given a monopole sector with a portal coupling to an additional scalar field S with a global U(1) symmetry. This new state, the Q-monopole-ball, is more stable than an isolated Q-ball made of only S particles, and it could be stable against fissioning into monopoles and free S particles. Stable Q-monopole-balls can contain large magnetic charges, providing a novel nongravitational mechanism for binding like-charged monopoles together. They could be produced from a phase transition in the early universe and account for all dark matter.

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