Is SU(2)/sub L/ x SU(2)/sub R/ x U/sub B/-L(1) a viable symmetry at low energy
We consider the gauge groups SU(2)/sub L/ x SU(2)/sub R/ x U/sub B/-L(1) with low-energy parity restoration and SU(2)/sub L/ x T/sub 3R/ x U/sub B/-L(1) as alternatives to the standard model at low energies, and fit their parameters to the neutral-current data. It is shown that if present phenomenological fits to data are taken seriously, the left-right-symmetric model is disfavored because it requires either too small a value of sin/sup 2/theta/sub W/ to be consistent with grand unification or if sin/sup 2/theta/sub W/ is chosen at a reasonable value, it then requires an imaginary mass for one of the Z bosons. The second gauge group is consistent with data, and the best fits yield sin/sup 2/theta/sub W/approx. =0.24 and M/sub Z//sub 1/ = 88 +- 8 GeV, M/sub Z//sub 2/approx.230 GeV.
- Research Organization:
- Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403
- DOE Contract Number:
- AT06-76ER70004
- OSTI ID:
- 6299315
- Journal Information:
- Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 27:5; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
INTERACTIONS
LIE GROUPS
MASS
MATHEMATICAL MODELS
NEUTRAL-CURRENT INTERACTIONS
PARITY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
SU GROUPS
SU-2 GROUPS
SYMMETRY
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS