Coupling-constant renormalization in unified gauge theories containing the Pati--Salam model

Journal Article · Fri Oct 01 00:00:00 EDT 1976 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.14.1896· OSTI ID:7333635

Elias, V

The relationship between sin/sup 2/theta/sub W/ and the renormalized quark--gluon constant is found for unified models containing the Pati--Salam model with either fractional or integral quark charges, if SU(2)/sub L/ x U(1) x SU(3) or SU(2)/sub L/ x SU(2)/sub R/ x SU(3) is preserved down to the final stage of symmetry breaking. sin/sup 2/theta/sub W/ is reduced from a bare value of 3/8 to asymptotic values of 1/6 and 1/4, respectively, in the limit of a large quark--gluon coupling constant. The relevance of this limit is discussed for Pati--Salam models with fractional and integral quark charges. The experimental range for sin/sup 2/theta/sub W/ is shown to be consistent with an asymptotic value of 1/4, but not 1/6, if the Weinberg--Salam constraint m/sub Z//sup 2/ = m/sub W//sup 2//cos/sup 2/theta/sub W/ is relaxed. (AIP)

• Research Organization: Department of Physics and Astronomy, University of Massachusetts, Amherst, Massachusetts 01002
• OSTI ID: 7333635
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 14:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPOSITE MODELS
COUPLING CONSTANTS
ELEMENTARY PARTICLES
GLUON MODEL
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
QUARK MODEL
QUARKS
RENORMALIZATION
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS