Quantum Field Theory I by Edouard B. Manoukian

Author:Edouard B. Manoukian
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(5.10.9)

This equation will be analyzed in Sect. 5.10.2.

The quantum corrections to the propagators are referred to as radiative corrections. In general, a diagram depicting a process, involving no integrations over closed loops, i.e., no radiative corrections, is referred to as tree diagram.

5.10.1 Electron Self-Energy and Its Interpretation

To determine the modified electron propagator , due to the interaction, and provide its physical interpretation, we evaluate the self energy-part Σ( p), given by the integral (Fig. 5.10)

Fig. 5.10The inverse of the modified electron propagator, due to the interaction, to second order. The corresponding mathematical expression will be denoted by . Note the minus sign between the latter two terms

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