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Perturbative gauge invariance: the electroweak theory
Author(s) -
Dütsch Michael,
Schaf Günter
Publication year - 1999
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/(sici)1521-3889(199905)8:5<359::aid-andp359>3.0.co;2-m
Subject(s) - physics , electroweak interaction , introduction to gauge theory , gauge boson , gauge anomaly , particle physics , brst quantization , gauge theory , supersymmetric gauge theory , quantum gauge theory , technicolor , theoretical physics , mathematical physics , quantum electrodynamics , gauge fixing
The concept of perturbative gauge invariance formulated exclusively by means of asymptotic fields is generalized to massive gauge fields. Applying it to the electroweak theory leads to a complete fixing of couplings of scalar and ghost fields and of the coupling to leptons, in agreement with the standard theory. The W/Z mass ratio is also determined, as well as the chiral character of the fermions. We start directly with massive gauge fields and leptons and, nevertheless, obtain a theory which satisfies perturbative gauge invariance.