Reviving trinification models through an E6 -extended supersymmetric GUT

Research output: Contribution to journalArticle


We present a supersymmetric (SUSY) model based on trinification [SU(3)]3 and family SU(3)F symmetries embedded into a maximal subgroup of E8, where the sectors of light Higgs bosons and leptons are unified into a single chiral supermultiplet. The common origin of gauge trinification and of the family symmetry from E8 separates the model from other trinification-based GUTs, as it protects, in particular, the Standard Model fermions from gaining mass until the electroweak symmetry is broken. Furthermore, it allows us to break the trinification symmetry via vacuum expectation values in SU(3)-adjoint scalars down to a left-right symmetric theory. Simultaneously, it ensures the unification of the gauge and Yukawa couplings as well as proton stability. Although the low-energy regime (e.g., mass hierarchies in the scalar sector determined by a soft SUSY-breaking mechanism) is yet to be established, these features are one key to revive the once very popular trinification-based GUTs.


External organisations
  • University of Aveiro
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number075031
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
Publication statusPublished - 2017 Apr 1
Publication categoryResearch

Related research output

Wessén, J., 2018, Lund: Lund University, Faculty of Science, Department of Astronomy and Theoretical Physics. 196 p.

Research output: ThesisDoctoral Thesis (compilation)

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Related projects

Astrid Ordell & Roman Pasechnik


Project: Dissertation

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