The vacuum of the minimal nonsupersymmetric SO(10) unification

Journal Article · Mon Feb 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.035015· OSTI ID:21409210

Bertolini, Stefano; Di Luzio, Luca; Malinsky, Michal ^[1]

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1. INFN, Sezione di Trieste, and SISSA, Via Beirut 4, I-34014 Trieste (Italy)

We study a class of nonsupersymmetric SO(10) grand-unified scenarios where the first stage of the symmetry breaking is driven by the vacuum expectation values of the 45-dimensional adjoint representation. Three-decade-old results claim that such a Higgs setting may lead exclusively to the flipped SU(5) x U(1) intermediate stage. We show that this conclusion is actually an artifact of the tree-level potential. The study of the accidental global symmetries emerging in various limits of the scalar potential offers a simple understanding of the tree-level result and a rationale for the drastic impact of quantum corrections. We scrutinize in detail the simplest and paradigmatic case of the 45{sub H}+16{sub H} Higgs sector triggering the breaking of SO(10) to the standard electroweak model. We show that the minimization of the one-loop effective potential allows for intermediate SU(4){sub C} x SU(2){sub L} x U(1){sub R} and SU(3){sub c} x SU(2){sub L} x SU(2){sub R} x U(1){sub B-L} symmetric stages as well. These are the options favored by gauge unification. Our results, that apply whenever the SO(10) breaking is triggered by <45{sub H}>, open the path for hunting the simplest realistic scenario of nonsupersymmetric SO(10) grand unification.

• OSTI ID: 21409210
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CORRECTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
GRAND UNIFIED THEORY
HIGGS BOSONS
HIGGS MODEL
LIE GROUPS
MATHEMATICAL MODELS
MINIMIZATION
OPTIMIZATION
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SO GROUPS
SO-10 GROUPS
SU GROUPS
SU-2 GROUPS
SU-4 GROUPS
SU-5 GROUPS
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG-SALAM GAUGE MODEL