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- W310413900 abstract "The exact or functional renormalization group equation describes the renormalization group flow of the effective average action $Gamma_k$. The ordinary effective action $Gamma_0$ can be obtained by integrating the flow equation from an ultraviolet scale $k=Lambda$ down to $k=0$. We give several examples of such calculations at one-loop, both in renormalizable and in effective field theories. We use the results of Barvinsky, Vilkovisky and Avramidi on the non-local heat kernel coefficients to reproduce the four point scattering amplitude in the case of a real scalar field theory with quartic potential and in the case of the pion chiral lagrangian. In the case of gauge theories, we reproduce the vacuum polarization of QED and of Yang-Mills theory. We also compute the two point functions for scalars and gravitons in the effective field theory of scalar fields minimally coupled to gravity." @default.
- W310413900 created "2016-06-24" @default.
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- W310413900 date "2016-04-01" @default.
- W310413900 modified "2023-10-02" @default.
- W310413900 title "Computing the effective action with the functional renormalization group" @default.
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- W310413900 doi "https://doi.org/10.1140/epjc/s10052-016-4063-3" @default.
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