Departure from Weinberg-Salem model and Grand Unification
The spontaneous symmetry breakdown of Grand Unified Groups like SO(10) can lead to an extra U(1) group beyond the SU(2) x U(1) of Weinberg-Salam. The neutral current data in such models could depend on three new parameters beyond the two in the standard model. However, grand unification imposes restriction on coupling constants limiting the analysis to two new parameters. Further, only one new parameter occurs in neutrino-scattering data. More accurate data can thus be used in the future to set limits on these parameters. The present data when used with the more general parametrization no longer determines the value of sin/sup 2/ theta/sub w/ as accurately. This leads to a greater uncertainty in the estimate of the proton lifetime.
- Research Organization:
- Oregon Univ., Eugene (USA). Inst. of Theoretical Science
- DOE Contract Number:
- AT06-76ER70004
- OSTI ID:
- 6835498
- Report Number(s):
- DOE/ER/70004-274
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645301* -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
CURRENTS
DATA
INFORMATION
LIE GROUPS
MATHEMATICAL MODELS
NEUTRAL CURRENTS
NUMERICAL DATA
PARTICLE MODELS
SO GROUPS
SU GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
THEORETICAL DATA
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
WEINBERG-SALAM GAUGE MODEL
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
CURRENTS
DATA
INFORMATION
LIE GROUPS
MATHEMATICAL MODELS
NEUTRAL CURRENTS
NUMERICAL DATA
PARTICLE MODELS
SO GROUPS
SU GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
THEORETICAL DATA
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
WEINBERG-SALAM GAUGE MODEL