Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures

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The promising solution to the strong CP problem by a Peccei-Quinn (PQ) symmetry may introduce quality and hierarchy problems, which are both relevant to Planck physics. In this paper, we study whether both problems can be explained by introducing a simple hidden gauge group which satisfies the WGC or its variant. As a concrete example, we point out that a weakly-coupled hidden SU(N) gauge symmetry, which is broken down to SO(N), can do this job in the context of a Tower/sub-Lattice WGC. Cosmology is discussed.

Original languageEnglish
Article number32
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 2020 Oct 1


  • Beyond Standard Model
  • Cosmology of Theories beyond the SM
  • Global Symmetries


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