Can QFT be UV finite as well as effective ?

Details Can QFT be UV finite as well as effective ? Can QFT be UV finite as well as effective ?

1999-01-27

arxiv.org/abs/hep-th/9901138v3

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, LaTex, no figure, invited talk, in: Proceedings of the XIth International Conference "Problems of Quantum Field Theor

Scientific paper

A new attempt is demonstrated that QFTs can be UV finite if they are viewed as the low energy effective theories of a fundamental underlying theory (complete and well-defined in all respects) according to the modern standard point of view. This approach is much simpler in principle and in technology comparing to any known renormalization program. Some subtle and difficult issues can be easily resolved. The importance of the procedure for defining the ambiguities is fully appreciated in the new approach. Some simple but important nonperturbative examples are discussed to show the power and plausibility of the new approach.

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