The universal expression for the amplitude square in quantum electrodynamics
General Physics
2016-01-20 v1
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.
Cite
@article{arxiv.1507.03522,
title = {The universal expression for the amplitude square in quantum electrodynamics},
author = {K. S. Karplyuk and O. O. Zhmudskyy},
journal= {arXiv preprint arXiv:1507.03522},
year = {2016}
}
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4 pages