Electroweak theory without spontaneous symmetry breaking
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 an essentially complete fixing of couplings of scalar and ghost fields and of the coupling to fermionic matter, in agreement with the standard theory. The W/Z mass ratio is also determined, as well as the chiral character of the fermions. Spontaneous symmetry breaking plays no role in this approach. Instead, the standard model comes out as the consequence of one single principle, which is (quantum) gauge invariance.Keywords
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