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Some properties of single loop diagrams in perturbation theory

✍ Scribed by M. Fowler; P. V. Landshoff; R. W. Lardner


Book ID
112839031
Publisher
Società Italiana di Fisica
Year
1960
Weight
20 KB
Volume
18
Category
Article
ISSN
0029-6341

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Two-Loop Diagrams in Causal Perturbation
✍ Andreas Aste 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 521 KB

Scalar two-loop diagrams are calculated analytically in massive cases needed for the computation of boson and fermion propagators in QED and QCD by the causal method of Epstein and Glaser. It is demonstrated that this method, which is the basis for the so-called dispersive methods, provides many adv