On the lowest order electroweak corrections to spin-12 fermion scattering: (I). The one-loop diagrammar

Abstract Based on a gauge model of the electroweak interaction the total set of all one-loop diagrams for scattering of spin - 1 2 fermions is calculated. Throughout the calculations, the type of fermions (l, ν, …) and of heavy vector bosons (W ± Z 0 , …) is not specified. Derivation of finite parts of each diagram is carried out under the restriction that all invariants of the amplitude are much larger than all fermion masses squared. This allows us to use the expression obtained at arbitrary high energies where weak and electromagnetic interaction strengths are comparable.