Symmetry and combinatorics in the. delta. expansion for QED

Journal Article · Fri May 15 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.3713· OSTI ID:7184032

Segev, B ^[1]

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1. Department of Physics, Technion Israel Institute of Technology, 32000 Haifa (Israel)

Combinatorics and symmetry are used to solve calculational problems in applying the {delta}-expansion method to QED. Adequate Feynman rules are used to simplify previous calculations and Ward identities are obtained. In the case with no external fermions an equivalence to the conventional loop expansion is established, both through the use of path integrals and through explicit calculations of the effective vertices. The Ward identities are reduced in this case to the conventional ones implied by gauge invariance.

• OSTI ID: 7184032
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 45:10; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
QUANTUM ELECTRODYNAMICS
WARD IDENTITY
COUPLING CONSTANTS
DIRAC OPERATORS
FERMIONS
FEYNMAN DIAGRAM
FEYNMAN PATH INTEGRAL
FREE ENERGY
GAUGE INVARIANCE
GREEN FUNCTION
LAGRANGIAN FUNCTION
PARTITION FUNCTIONS
PERTURBATION THEORY
PHOTONS
PROPAGATOR
QUANTUM MECHANICS
SPACE-TIME
SYMMETRY
BOSONS
DIAGRAMS
ELECTRODYNAMICS
ELEMENTARY PARTICLES
ENERGY
FIELD THEORIES
FUNCTIONS
INTEGRALS
INVARIANCE PRINCIPLES
MASSLESS PARTICLES
MATHEMATICAL OPERATORS
MECHANICS
PHYSICAL PROPERTIES
QUANTUM FIELD THEORY
QUANTUM OPERATORS
THERMODYNAMIC PROPERTIES
662220* - Quantum Electrodynamics- (1992-)
662120 - General Theory of Particles & Fields- Symmetry
Conservation Laws
Currents & Their Properties- (1992-)
661100 - Classical & Quantum Mechanics- (1992-)