Abstract :
Starting from the historical Fermi four-fermion low-energy effective electroweak interactions Lagrangian for the third generation of quarks, augmented by an NJL type interaction responsible for dynamical symmetry breaking and heavy quark mass generation, and fixing the scalar (Higgs) field v.e.v. at v = 247 GeV, we show that: (1) heavy quark bound states QQ̄ with quantum numbers of the W± bosons exist for arbitrarily weak (positive) vector coupling GF, so long as the quark mass is sufficiently large; (2) a massive composite neutral vector boson (Z0) appears; (3) a massless composite parity-conserving neutral vector boson (γ) appears, the composite Higgs-Kibble ghosts decouple from the quarks and other particles, the longitudinal components of the vector boson propagators vanish, as GF→GFexpt.=1/(2v2), which also implies that the cutoff Λ→∞. Thus, the Fermi interaction model is equivalent to a locally gauge invariant theory but with definite values of coupling constants and masses. The model discussed here was chosen for illustrative purposes and is not equivalent to the Standard Model.
