Abstract
A new method is proposed for calculating amplitudes of processes involving spin-1/2 fermions.The method is based on the use of the isotropic-vierbein vectors in Minkowski space and the basis spinors associated with them.The amplitudes for the electron -positron interaction processes e − e + → f ¯ f and e − e + → W − W + and the amplitude for one of the possible diagrams for the process e + e − → e + e − e + e − e + e − are calculated in order to test and illustrate the potential of the method. c � 2003 MAIK "Nauka/Interperiodica".
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