Grand unification of preon models

Journal Article · Tue Nov 01 00:00:00 EST 1983 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.28.2258· OSTI ID:5499197

Rizzo, T G

We investigate several preon models within the context of grand unification. We use the value of ..cap alpha../sub s/ (i.e., ..lambda../sub MS/, where MS indicates the modified minimal-subtraction scheme) and the precolor scale M/sub PC/ as input into the renormalization-group equations, and calculate the value of sin/sup 2/theta/sub W/(M/sub W/) and the unification mass scale M/sub U/. As a consistency check we follow the precolor coupling constant down from M/sub U/ to M/sub PC/ to see where precolor becomes strong. The models which are consistent with present neutral-current data and proton-lifetime limits yield values of M/sub U/ somewhat larger than the standard SU(5) model. The unification group G is not constrained by the analysis. We consider both SU(N) and SO(N) as precolor groups and allow for two breaking patterns G..-->..SU(3)/sub C/ x SU(2)/sub L/ x U(1)/sub Y/ x precolor or the low right-handed mass-scale possibility G ..-->.. SU(3)/sub c/ x SU(2)/sub L/ x SU(2)/sub R/ x U(1)/sub B-L/ x precolor. Of the various SO(N) possibilities examined none are found to satisfy all the constraints.

• Research Organization: Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa 50011
• OSTI ID: 5499197
• Journal Information: Phys. Rev. D; (United States), Vol. 28:9
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LEPTONS
COMPOSITE MODELS
QUARKS
UNIFIED-FIELD THEORIES
RENORMALIZATION
BOUND STATE
COUPLING CONSTANTS
DECAY
HIGGS MODEL
LIFETIME
PROTONS
QUANTUM CHROMODYNAMICS
SO GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
U-1 GROUPS
UNIFIED GAUGE MODELS
BARYONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
LIE GROUPS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SU GROUPS
SYMMETRY GROUPS
U GROUPS
645400* - High Energy Physics- Field Theory
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