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The Universal Expression for the Amplitude Square in Quantum Electrodynamics
Department of Radiophysics, Taras Shevchenko University, Kyiv, Ukraine
Department of Physics, University of Central Florida, Orlando, FL, USA
- 1 Department of Radiophysics, Taras Shevchenko University, Kyiv, Ukraine
- 2 Department of Physics, University of Central Florida, Orlando, FL, USA
Journal of Modern Physics·Volume 06 (2015)·Pages 2219–2225·Published 4 December 2015·DOI10.4236/jmp.2015.615226
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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.
KeywordsQuantum ElectrodynamicsAmplitude SquarePolarized Particles
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