The gauge coupling evolutions of an $\mathrm{SU}(8)$ theory with the maximally symmetry breaking pattern

Abstract

We study the renormalizable group equations (RGEs) of the extended strong and weak gauge couplings in an $\mathrm{SU}(8)$ theory, where three-generational SM fermions are non-trivially embedded. This framework was previously found to generate the observed SM quark/lepton mass hierarchies and the Cabibbo-Kobayashi-Maskawa mixing pattern through its maximally breaking pattern. The field theoretical two-loop RGEs can not achieve the gauge coupling unification with the minimal setup, unless additional adjoint Higgs fields as well as the gravity-induced $d=5$ term to the $\mathrm{SU}(8)$ field strength term are included.

42 pages with references, two appendices, 11 tables, 3 figures. Sequel to: arXiv:2307.07921, arXiv:2402.10471, published at JHEP

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• PyR@TE 3
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Cited by in corpus (4)

• The Standard Model quark/lepton masses and the Cabibbo-Kobayashi-Maskawa mixing in an $\mathrm{SU}(8)$ theory
• The unification in an $\widehat{\mathfrak{su}}(8{)}_{k_U=1}$ affine Lie algebra
• Further study of the maximally symmetry breaking patterns in an $\mathrm{SU}(8)$ theory
• The non-topological $Z^{\prime }$ string in the 331 model and its classical stability