Symmetry breaking and naturalness of parity conservation in weak neutral currents in left-right--symmetric gauge theories
We discuss the symmetry-breaking patterns and the naturalness of parity conservation in weak neutral-current interactions in the left-right--symmetric SU(2)/sub L/ x SU(2)/sub R/ x U(1) gauge theories. Two Higgs systems are discussed which enable us to achieve the desired breaking of the gauge symmetry. We show by a detailed analysis of the Higgs potential that the more economical of the two Higgs systems, that involving left and right Higgs scalar doublets, fails to meet the criteria of naturalness of parity conservation in neutral-current interactions. We find that with the second Higgs system neutral currents conserve parity naturally regardless of the structure of the physical charged-current weak interactions. Implications of this for the computability of induced parity violation in higher orders and the search for parity nonconservation in atoms are also discussed.
- Research Organization:
- Brookhaven National Laboratory, Upton, N.Y., 11973
- OSTI ID:
- 6841896
- Journal Information:
- Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Journal Issue: 9 Vol. 17:9; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BASIC INTERACTIONS
CABIBBO ANGLE
CURRENTS
FUNCTIONS
GAUGE INVARIANCE
HIGGS MODEL
INTERACTIONS
INVARIANCE PRINCIPLES
LAGRANGIAN FUNCTION
LIE GROUPS
MATHEMATICAL MODELS
NEUTRAL CURRENTS
NEUTRAL-CURRENT INTERACTIONS
P INVARIANCE
PARTICLE INTERACTIONS
PARTICLE MODELS
SU GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
WEAK INTERACTIONS
WEAK NEUTRAL CURRENTS