Q-monopole-ball: a topological and nontopological soliton

Yang Bai, Sida Lu*, Nicholas Orlofsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number109
JournalJournal of High Energy Physics
Issue number1
StatePublished - Jan 2022


  • Beyond Standard Model
  • Solitons Monopoles and Instantons


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