Grand unification threshold effects in supersymmetric SU(5) models

Journal Article · Mon Feb 08 04:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.709· OSTI ID:6819102

Hagiwara, K; Yamada, Y ^[1]

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1. Theory Group, KEK, Tsukuba, Ibaraki 305 (Japan) Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)

We study low energy consequences of the heavy particle mass spectrum in two specific supersymmetric SU(5) models, the minimal model and the missing doublet model with natural doublet-triplet splitting. The grand unification threshold effects are found to be significant and strongly model dependent: The minimal model favors a high supersymmetry threshold ([Lambda][sub SUSY][gt]1 TeV) for [alpha][sub [ital s]]([ital m][sub [ital Z]])[sub M[bar S]]=0.113[plus minus]0.004 (M[bar S] denotes the modified minimal subtraction scheme), whereas the missing doublet model favors a low threshold ([Lambda][sub SUSY][lt]9 TeV). The [ital X]-boson-mediated proton decay lifetime can be shortened by more than one order of magnitude in both models.

• OSTI ID: 6819102
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:6; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662210* -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COUPLING CONSTANTS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONIC PARTICLE DECAY
HADRONS
HIGGS MODEL
LIE GROUPS
MASS SPECTRA
MATHEMATICAL MODELS
MIXING
NUCLEONS
PARTICLE DECAY
PARTICLE KINEMATICS
PARTICLE MODELS
PROTONS
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Particle Systematics-- Unified Theories & Models-- (1992-)
SPECTRA
SU GROUPS
SU-5 GROUPS
SUPERSYMMETRY
SYMMETRY
SYMMETRY GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES