TITLE:
The Universal Expression for the Amplitude Square in Quantum Electrodynamics
AUTHORS:
Konstantin Karplyuk, Oleksandr Zhmudskyy
KEYWORDS:
Quantum Electrodynamics, Amplitude Square, Polarized Particles
JOURNAL NAME:
Journal of Modern Physics,
Vol.6 No.15,
December
29,
2015
ABSTRACT: The universal expression for the amplitude square 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.