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arXiv · 1507.03522

The universal expression for the amplitude square in quantum electrodynamics

K. S. Karplyuk·O. O. Zhmudskyy
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Abstract

The universal expression for the amplitude square |u_f M u_i|^2 for any matrix of interaction M is derived. It has obvious covariant form. It allows the avoidance of calculation of products of the Dirac's matrices traces and allows easy calculation of cross-sections of any different processes with polarized and unpolarized particles.

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K. S. Karplyuk, O. O. Zhmudskyy. 2015-07-04. The universal expression for the amplitude square in quantum electrodynamics. https://doi.org/10.4236/jmp.2015.615226

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