Sin/sup 2/theta/sub W/,. cap alpha. /sub s/, and the proton lifetime in SU(8) multigenerational grand unification

Journal Article · Mon Oct 01 04:00:00 EDT 1984 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.30.1598· OSTI ID:7058525

Yun, S K

In the SU(8) theory of multigenerational grand unification in which fermions are assigned to 8 bar/sub L/ + 28 bar/sub L/ + 56/sub L/ representations, sin/sup 2/ theta/sub W/(M/sub W/) and ..cap alpha../sub s/(M/sub W/) are derived from the renormalization-group equation. The SU(8) symmetry breaks into the generation group SU(3)/sup G/ and the family group SU(5)/sup F/, and further breaks in steps. If the colored Higgs particles are superheavy, the mass (M/sub X/) of the superheavy boson (X) in this model is predicted to be M/sub x/ = M/sub A/ = 1.6-20 times that in the standard SU(5) model, and the mass of the generation boson M/sub g/ < 2 x 10/sup 3/ TeV, for sin/sup 2/theta/sub W/(M/sub W/) = 0.229 +/- 0.009 and ..cap alpha../sub s/(M/sub W/) = 0.135 +/- 30%. The lifetime (tau/sub p/) for proton decay is longer by a factor of 7 to (2 x 10/sup 5/) than that in the SU(5) model. 8 references.

• Research Organization: Massachusetts Institute of Technology, Cambridge
• OSTI ID: 7058525
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 30:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COUPLING CONSTANTS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
HIGGS BOSONS
LIE GROUPS
LIFETIME
MASS
MATHEMATICAL MODELS
MULTIPLETS
NUCLEONS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE MULTIPLETS
POSTULATED PARTICLES
PROTONS
RENORMALIZATION
SEMILEPTONIC DECAY
STANDARD MODEL
SU GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEAK PARTICLE DECAY
WEINBERG ANGLE