Probing the grand-unification-scale mass spectrum through precision measurements on the weak-scale parameters

Journal Article · Mon Aug 17 00:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.1014· OSTI ID:7158118

Hisano, J; Murayama, H; Yanagida, T ^[1]

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1. Department of Physics, Tohoku University, Sendai 980 (Japan)

We study the renormalization-group evolution of gauge coupling constants including mass threshold effects of both light and heavy particles, in the minimal supersymmetric SU(5) grand unified model assuming supersymmetry breaking at {approx lt}1 TeV. We show that a certain combination of superheavy masses {ital M}{sub {ital V}}{sup 2}{ital M}{sub {Sigma}} is tightly constrained, while the mass of the color-triplet Higgs boson, {ital M}{sub {ital H}}, can vary from 2{times}10{sup 13} to 2{times}10{sup 17} GeV. With a relatively heavy color-triplet mass ({ital M}{sub {ital H}}{similar to}10{sup 17} GeV), the present nucleon-decay experiments still allow superparticles below 1 TeV. The importance of a precise measurement on {alpha}{sub 3} is stressed.

• OSTI ID: 7158118
• Journal Information: Physical Review Letters; (United States), Vol. 69:7; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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GRAND UNIFIED THEORY
MASS SPECTRA
COUPLING CONSTANTS
HIGGS BOSONS
LIMITING VALUES
MASS
STANDARD MODEL
SU-5 GROUPS
TEV RANGE 01-10
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
SPECTRA
SU GROUPS
SYMMETRY GROUPS
TEV RANGE
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
662210* - Specific Theories & Interaction Models
Particle Systematics- Unified Theories & Models- (1992-)