Abstract

We calculate fermionic couplings of gauge bosons and would-be Goldstone bosons within an SU(2) × U(1) gauge theory with nonlinear SSB where no physical Higgs occurs. This theory, which at the classical level is the limiting case (MH -> infinity) of the electroweak standard model, possesses an additional (hidden) local gauge symmetry connected with a triplet of new (heavy) gauge bosons V. Due to nonrenormalizability, additional coupling' lagrangians show up at each loop order, leading to new vertices which do not exist at the tree level. We investigate the I-loop induced fermionic couplings by carefully separating new structures from terms which contribute solely to the renormalization of the original (old) vertices. It is shown that the resulting expressions for the new coupling parameters differ significantly from previous expectations.