Planck-scale unification and dynamical symmetry breaking

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.4902· OSTI ID:5010642

Lykken, J D ^[1]; Willenbrock, S ^[2]

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1. Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (United States) Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States) Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

We explore the possibility of unification of gauge couplings near the Planck scale in models of extended technicolor. We observe that models of the form [ital G][times]SU(3)[sub [ital c]][times]SU(2)[sub [ital L]][times]U(1)[sub [ital Y]] cannot be realized, due to the presence of massless neutral Goldstone bosons (axions) and light charged pseudo Goldstone bosons; thus, unification of the known forces near the Planck scale cannot be achieved. The next simplest possibility, [ital G][times]SU(4)[sub PS][times]SU(2)[sub [ital L]][times]U(1)[sub [ital T]3[ital R]], cannot lead to unification of the Pati-Salam and weak gauge groups near the Planck scale. However, superstring theory provides relations between couplings at the Planck scale without the need for an underlying grand-unified gauge group, which allows unification of the SU(4)[sub PS] and SU(2)[sub [ital L]] couplings.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5010642
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662210* -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIONS
BOSONS
COLOR MODEL
COMPOSITE MODELS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FIELD THEORIES
GOLDSTONE BOSONS
GRAND UNIFIED THEORY
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
QUARK MODEL
STRING MODELS
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SU-4 GROUPS
SUPERSTRING MODELS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES