Comment on SU(16) grand unification

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.575· OSTI ID:5288207

Lavoura, L ^[1]

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1. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

In a recent paper on SU(16) grand unification, because of the presence of intermediate-energy gauge groups containing products of U(1) factors which are not orthogonal among themselves, the renormalization-group treatment has a few small errors. I correct it. I emphasize that one should not switch gauge couplings at the various thresholds. It is easier, and it avoids errors, to use throughout the gauge couplings of the standard model, and compute at each threshold, in the usual way, the extra contributions to the beta functions from the extra nondecoupled fields. I also point out that the SU(16) grand unification theory, due to the large number of scalars present in it, is not asympototically free. It becomes a strong-coupling theory at energies only slightly larger than the unification scale.

• DOE Contract Number: FG02-91ER40682
• OSTI ID: 5288207
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662110 -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662210* -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ERRORS
FIELD THEORIES
GRAND UNIFIED THEORY
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
RENORMALIZATION
SCALARS
STRONG-COUPLING MODEL
SU GROUPS
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES