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The Universal Expression for the Amplitude Square in Quantum Electrodynamics

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DOI: 10.4236/jmp.2015.615226    2,801 Downloads   3,083 Views

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.

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Karplyuk, K. and Zhmudskyy, O. (2015) The Universal Expression for the Amplitude Square in Quantum Electrodynamics. Journal of Modern Physics, 6, 2219-2225. doi: 10.4236/jmp.2015.615226.

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