Merons beyond Yang-Mills theory
- 1Cinvestav
- 2Universidad de las Américas, Sede Concepción
Abstract
A bstract : Within the wide variety of topological solitons supported by Yang-Mills theory, merons occupy a particularly distinguished role. Despite their simplicity, they represent genuinely non-Abelian configurations that can be regarded as the fundamental building blocks of instantons, and they provide a qualitatively accurate picture of confinement. In this work, we show that such configurations are, in fact, supported by a broad class of non-Abelian gauge theories beyond Yang-Mills, provided that suitable physical conditions are satisfied. Taking into account their gravitational backreaction, we further demonstrate that both black holes and Euclidean wormholes sourced by merons admit natural extensions within this generalized framework, which regularizes the singular behavior they exhibit in constant-curvature backgrounds. As a byproduct, we construct a regular black hole solution supported by genuinely non-Abelian gauge fields, based on a non-Abelian generalization of the Ayón-Beato-García nonlinear electrodynamics. As a consequence, physical effects intrinsic to merons are likewise expected to be inherited by these classes of theories beyond the Yang-Mills framework. A notable example is the spin from isospin effect, whereby bosonic excitations charged under the gauge group can effectively behave as fermionic degrees of freedom.
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BibTeX
@article{diez2026merons,
title = {{Merons beyond Yang-Mills theory}},
author = {Borja Diez and Luis Guajardo},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)145},
url = {https://link.springer.com/article/10.1007/JHEP10(2026)145},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Merons beyond Yang-Mills theory
AU - Borja Diez
AU - Luis Guajardo
PY - 2026
DA - 2026/10/14
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)145
UR - https://link.springer.com/article/10.1007/JHEP10(2026)145
AB - A bstract : Within the wide variety of topological solitons supported by Yang-Mills theory, merons occupy a particularly distinguished role. Despite their simplicity, they represent genuinely non-Abelian configurations that can be regarded as the fundamental building blocks of instantons, and they provide a qualitatively accurate picture of confinement. In this work, we show that such configurations are, in fact, supported by a broad class of non-Abelian gauge theories beyond Yang-Mills, provided that suitable physical conditions are satisfied. Taking into account their gravitational backreaction, we further demonstrate that both black holes and Euclidean wormholes sourced by merons admit natural extensions within this generalized framework, which regularizes the singular behavior they exhibit in constant-curvature backgrounds. As a byproduct, we construct a regular black hole solution supported by genuinely non-Abelian gauge fields, based on a non-Abelian generalization of the Ayón-Beato-García nonlinear electrodynamics. As a consequence, physical effects intrinsic to merons are likewise expected to be inherited by these classes of theories beyond the Yang-Mills framework. A notable example is the spin from isospin effect, whereby bosonic excitations charged under the gauge group can effectively behave as fermionic degrees of freedom.
SN - 1029-8479
ER -