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Gauge-invariant three-boson vertices in the standard model and the static properties of the [ital W]

Journal Article · · Physical Review, D (Particles Fields); (United States)
;  [1]
  1. Department of Physics, New York University, 4 Washington Place, New York, New York 10003 (United States)
+ Show Author Affiliations

We use the [ital S]-matrix pinch technique to derive to one-loop order gauge-independent [gamma][ital W][sup +][ital W[minus]] and [ital ZW][sup +][ital W[minus]] vertices in the context of the standard model, with all three incoming momenta off shell. We show that the [gamma][ital W][sup +][ital W[minus]] vertex so constructed is related to the gauge-independent [ital W] self-energy, derived by Degrassi and Sirlin, by a very simple QED-like Ward identity. The same results are obtained by the pinch technique applied directly to the process [ital e][sup +][ital e[minus]][r arrow][ital W][sup +][ital W[minus]]. Explicit calculations give rise to expressions for static properties of the [ital W] gauge bosons such as the magnetic dipole and electric quadrupole moments, which satisfy the crucial properties of infrared finiteness as well as gauge independence.

OSTI ID:
5927139
Journal Information:
Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:9; ISSN PRVDAQ; ISSN 0556-2821
Country of Publication:
United States
Language:
English

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Related Subjects

662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
DIPOLE MOMENTS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FUNCTIONS
GAUGE INVARIANCE
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
INVARIANCE PRINCIPLES
LEPTON-LEPTON INTERACTIONS
MAGNETIC DIPOLE MOMENTS
MAGNETIC MOMENTS
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PHOTONS
QUADRUPOLE MOMENTS
STANDARD MODEL
UNIFIED GAUGE MODELS
VERTEX FUNCTIONS
W MINUS BOSONS
W PLUS BOSONS
WARD IDENTITY
Z NEUTRAL BOSONS