Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-04-07
J.Phys.A36:8129-8140,2003
Physics
High Energy Physics
High Energy Physics - Theory
13 pages
Scientific paper
10.1088/0305-4470/36/29/317
We study the quantization problem of relativistic scalar and spinning particles interacting with a radiation electromagnetic field by using the path integral and the external source method. The spin degrees of freedom are described in terms of Grassmann variables and the Feynman kernel is obtained through functional integration on both Bose and Fermi variables. We provide rigourous proof that the Feynman amplitudes are only determined by the classical contribution and we explicitly evaluate the propagators.
Barducci Alessandro
Giachetti Riccardo
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