Unitary gauge, Stueckelberg formalism, and gauge-invariant models for effective Lagrangians
Journal Article
·
· Physical Review, D (Particles Fields); (United States)
- Universitaet Bielefeld, Fakultaet fuer Physik, 33501 Bielefeld (Germany)
Within the framework of the path-integral formalism we examine the different methods of removing the unphysical degrees of freedom from spontaneously broken gauge theories. These are the construction of the unitary gauge by gauge fixing, an [ital R][sub [xi]]-limiting procedure, and the decoupling of the unphysical fields by field transformations. In the unitary gauge there exists an extra quartically divergent Higgs self-interaction term, which cannot be neglected if perturbative calculations are performed in this gauge. Using the Stueckelberg formalism this procedure can be reversed; i.e., a gauge theory can be reconstructed from its unitary gauge. We also discuss the equivalence of effective-Lagrangian theories, containing arbitrary interactions, to (nonlinearly realized) spontaneously broken gauge theories and we show how they can be extended to Higgs models.
- OSTI ID:
- 6026607
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:6; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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FEYNMAN PATH INTEGRAL
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GAUGE INVARIANCE
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INVARIANCE PRINCIPLES
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Currents & Their Properties-- (1992-)
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FEYNMAN PATH INTEGRAL
FUNCTIONS
GAUGE INVARIANCE
HIGGS MODEL
INTEGRALS
INVARIANCE PRINCIPLES
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
PARTICLE MODELS
PERTURBATION THEORY
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UNIFIED GAUGE MODELS
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