General vacuum stability of orbifold gauge breaking and application to asymptotic grand unification

Abstract

We examine the vacuum stability of gauge symmetry breaking in five dimensions, compactified on the S₁/(ℤ₂ × ℤ'₂) orbifold. We consider SU(N), Sp(N), SO(2N) and SO(2N+1) theories in the bulk, and provide an exhaustive classification of possible parity assignments that lead to stable orbifolds and of the corresponding symmetry breaking patterns. We use these results in the search for viable asymptotic grand unification theories (aGUT), testing the stability criteria on models based on SU(6) and SU(8). As a result, we identify two viable aGUTs: a unique SU(6) pathway down to the Standard Model, and one SU(8) model leading to an intermediate Pati-Salam partial unification.

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BibTeX

@article{cacciapaglia2026general,
  title = {{General vacuum stability of orbifold gauge breaking and application to asymptotic grand unification}},
  author = {Giacomo Cacciapaglia and Alan S Cornell and Aldo Deandrea and Wanda Isnard and Roman Pasechnik and Anca Preda and Zhi-Wei Wang},
  journal = {Physical Review D},
  year = {2026},
  month = oct,
  doi = {10.1103/physrevd.111.095013},
  eprint = {2409.16137},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-04726005v1},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - General vacuum stability of orbifold gauge breaking and application to asymptotic grand unification
AU  - Giacomo Cacciapaglia
AU  - Alan S Cornell
AU  - Aldo Deandrea
AU  - Wanda Isnard
AU  - Roman Pasechnik
AU  - Anca Preda
AU  - Zhi-Wei Wang
PY  - 2026
DA  - 2026/10/02
JO  - Physical Review D
DO  - 10.1103/physrevd.111.095013
UR  - https://hal.science/hal-04726005v1
AB  - We examine the vacuum stability of gauge symmetry breaking in five dimensions, compactified on the S_1/(ℤ_2 × ℤ'_2) orbifold. We consider SU(N), Sp(N), SO(2N) and SO(2N+1) theories in the bulk, and provide an exhaustive classification of possible parity assignments that lead to stable orbifolds and of the corresponding symmetry breaking patterns. We use these results in the search for viable asymptotic grand unification theories (aGUT), testing the stability criteria on models based on SU(6) and SU(8). As a result, we identify two viable aGUTs: a unique SU(6) pathway down to the Standard Model, and one SU(8) model leading to an intermediate Pati-Salam partial unification.
SN  - 2470-0010
SN  - 2470-0029
ER  -

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