TTP99-46 Asymptotic Expansions - Methods and Applications
TTP99-46 Asymptotic Expansions - Methods and Applications
TTP99-46 Asymptotic Expansions - Methods and Applications
Different viewpoints on the asymptotic expansion of Feynman diagrams
are reviewed. The relations between the field theoretic and diagrammatic
approaches are sketched. The focus is on problems with large masses
or large external momenta. Several recent applications also for other
limiting cases are touched upon. Finally, the pros and cons of the different
approaches are briefly discussed.
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