A Covariant Method for Calculating Amplitudes of Processes Involving Polarized Spin 1/2 Particles. Calculation of the Interference Terms in their Cross Sections

1997/01/20 by Alexander L. Bondarev
Physics and Astronomy · #hep-ph

paper · pdf

published as Theor.Math.Phys. 96 (1993) 837-844; Teor.Mat.Fiz. 96 (1993) 96-108 · 12 pages, LaTeX

arxiv created 1997/01/20 · arxiv updated 2009/11/30

Abstract

A covariant method is proposed for calculating the amplitudes of processes involving polarized spin 1/2 particles. It is suitable for calculating the interference terms in the cross sections of such processes. As an illustration, expressions are given for the amplitudes of electron-electron scattering in the lowest order of perturbation theory and expressions for the electron current in the case of emission of two bremsstrahlung photons in the ultrarelativistic limit.

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