The vacuum of the minimal nonsupersymmetric SO(10) unification

Journal Article · Mon Feb 01 00:00:00 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, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.035015; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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