A New Method for Computing Helicity Amplitudes

Abstract

An helicity formalism for perturbative calculations is presented. It is based on the formal insertion in spinor lines of a complete set of states built up with unphysical spinors. It is particularly convenient when massive spinors are present. Its application to $e^{+}{e}^{-}\to b\bar{b}{W}^{+}{W}^{-}$ is briefly discussed.

To appear in Proceedings Nonlinear Phenomena in Complex Systems. Polatsk Belarus. February 94 - 8 pages, 2 figs. using feynman.tex