QED
Publisher: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
Published: December 31, 1988
Format: Hardcover
Number of pages: 176
ISBN-13: 9783540502135
Subjects: Renormalization group; Quantum electrodynamics; Quantum field theory
Description: The authors give a detailed and pedagogically well written proof of the renormalizability of quantum electrodynamics in four dimensions. The proof is based on the free expansion of Gallavotti and Nicolò and is mathematically rigorous as well as impressively general. It applies to rather general models of quantum field theory including models with infrared or ultraviolet singularities, as shown in this monograph for the first time. Also discussed are the loop regularization for renormalized graphs and the Ward identities. The authors also establish that in QED in four dimensions only gauge invariant counterterms are required. This seems to be the first proof which will be accessible not only to the expert but also to the student.