Uncertainties in coupling constant unification

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.4028· OSTI ID:6645245

Langacker, P; Polonsky, N ^[1]

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1. Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)

The status of coupling constant unification in the standard model and its supersymmetric extension are discussed. Uncertainties associated with the input coupling constants, [ital m][sub [ital t]], threshold corrections at the low and high scales, and possible nonrenormalizable operators are parametrized and estimated. A simple parametrization of a general supersymmetric new particle spectrum is given. It is shown that an effective scale [ital M][sub SUSY] can be defined, but for a realistic spectrum it may differ considerably from the typical new particle masses. The implications of the lower (higher) values of [alpha][sub [ital s]]([ital M][sub [ital Z]]) suggested by low-energy ([ital Z]-pole) experiments are discussed.

• DOE Contract Number: AC02-76ER03071
• OSTI ID: 6645245
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
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Currents & Their Properties-- (1992-)
662210* -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING CONSTANTS
FIELD THEORIES
GRAND UNIFIED THEORY
MASS FORMULAE
MATHEMATICAL MODELS
PARTICLE MODELS
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Particle Systematics-- Unified Theories & Models-- (1992-)
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES