In this chapter, we first present a brief review of the weak interaction
theory. In particular, we discuss why the conserved vector current model had to
be modified to a new theory. After that, we clarify the physics of the spontaneous
symmetry breaking and then discuss the intrinsic problem of the Higgs mechanism
in the Weinberg-Salam model. In addition, we present the calculation of the vertex
correction due to the weak vector bosons and show that there is no logarithmic divergence
in this vertex corrections. Therefore, there is no need of the renormalization
procedure in the weak interaction models with massive vector bosons.
Keywords: CVC theory, vertex corrections of weak vector boson, Weinberg-Salam
model, spontaneous symmetry breaking, Higgs mechanism, right propagator of massive
vector boson, Lorentz condition.
