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- W4324044685 abstract "We examine some features of the non-renormalizability induced through the use of low-energy effective Lagrangians in loop diagrams, in the context of a scalar model which is ultraviolet finite and partially soluble. In this framework, one can directly demonstrate the mechanism leading to the non-renormalizability of the effective theory. This behavior is generated by approximations that are applicable at low energies but are generally inappropriate for evaluating loop diagrams that contain virtual high-energy particles. However, it is explicitly shown that one can match the results obtained in the renormalized effective theory with those found in the full theory at low energy. We argue that the infrared sectors of these theories are inherently similar, independently of the matching procedure. A closed-form expression is obtained, to leading order in the energy expansion, for the complete effective Lagrangian at all orders in perturbation theory. The model may be useful to clarify certain aspects of realistic, but more complex, effective field theories." @default.
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- W4324044685 date "2023-03-13" @default.
- W4324044685 modified "2023-09-26" @default.
- W4324044685 title "Loop corrections in a solvable UV-finite model and its effective field theory" @default.
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- W4324044685 doi "https://doi.org/10.1103/physrevd.107.065008" @default.
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