On-shell renormalization scheme: Difference between revisions

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Line 43: ==Vertex function== A similar reasoning using the [[vertex function]] leads to the renormalization of the electric charge <math>e_r</math>. This renormalization, and the fixing of renormalization terms is done using what is known from classical electrodynamics at large space scales. This leads to the value of the counterterm <math>\delta_1</math>, which is, in fact, equal to <math>\delta_2</math> because of the [[Ward–Takahashi identity]]. It is this calculation that ~~account~~accounts for the [[anomalous magnetic dipole moment]] of fermions. ==Rescaling of the QED Lagrangian==