Grand unification of preon models

Journal Article · Tue Nov 01 04:00:00 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), Journal Name: Phys. Rev. D; (United States) Vol. 28:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645301 -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOUND STATE
COMPOSITE MODELS
COUPLING CONSTANTS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
HIGGS MODEL
LEPTONS
LIE GROUPS
LIFETIME
MATHEMATICAL MODELS
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
PROTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RENORMALIZATION
SO GROUPS
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES