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't Hooft-Polyakov monopoles in non-Hermitian quantum field theory

Fring, A. ORCID: 0000-0002-7896-7161 & Taira, T. (2020). 't Hooft-Polyakov monopoles in non-Hermitian quantum field theory. Physics Letters B, 807, article number 135583. doi: 10.1016/j.physletb.2020.135583


We construct exact ’t Hooft-Polyakov monopole solutions in a non-Hermitian field theory with local non- Abelian SU(2) gauge symmetry and a modified antilinear CPT symmetry. The solutions are obtained in a fourfold Bogomolny-Prasad-Sommerfield scaling limit giving rise to two different types of monopole masses that saturate the lower energy bound. These two masses only coincide in the Hermitian limit and in the limit in which the symmetry breaking vacuum tends to the trivial symmetry preserving vacuum. In the two theories corresponding to the two known Dyson maps these two masses are exchanged, unlike the Higgs and the gauge masses, which remain the same in both theories. We identify three separate regions in parameter space bounded by different types of exceptional points. In the first region the monopole masses are finite and tend both to zero at the boundary exceptional point, in the second the monopole masses become complex and in the third only one of the monopole masses becomes zero at the boundary exceptional point, whereas the other tends to infinity. We find a self-dual point in parameter space at which the gauge mass becomes exactly identical to the monopole mass.

Publication Type: Article
Additional Information: © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (
Subjects: Q Science > QA Mathematics
Departments: School of Science & Technology > Mathematics
SWORD Depositor:
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