On-shell renormalization scheme: Difference between revisions

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==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 accountaccounts for the [[anomalous magnetic dipole moment]] of fermions.

==Rescaling of the QED Lagrangian==

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* {{Cite book|author=M. Peskin|author2=D. Schroeder|title=An Introduction to Quantum Field Theory|publisher=Addison-Weasley|___location=Reading|year=1995}}

* {{Cite book|author=M. Srednicki|url=http://www.physics.ucsb.edu/~mark/qft.html|title=Quantum Field Theory}}

* {{Cite book|author=T. Gehrmann|url=https://www.mitschriften.ethz.ch/main.php?page=3&details=161|title=Quantum Field Theory 1}}

[[Category:Quantum field theory]]