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Perturbative gauge invariance: the electroweak theory

Michael Dutsch·Gunter Scharf
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Abstract

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.

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Michael Dutsch, Gunter Scharf. 1999-03-11. Perturbative gauge invariance: the electroweak theory. https://arxiv.org/abs/hep-th/9612091

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