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Completeness and consistency of renormalization group flows

We study different renormalization group flows for scale-dependent effective actions, including exact and proper-time renormalization group flows. These flows have a simple one-loop structure. They differ in their dependence on the full field-dependent propagator, which is linear for exact flows. We...

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Hauptverfasser: Litim, Daniel F. (VerfasserIn) , Pawlowski, Jan M. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 31 July 2002
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2002, Jahrgang: 66, Heft: 2
ISSN:1550-2368
DOI:10.1103/PhysRevD.66.025030
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.66.025030
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.66.025030
Volltext
Verfasserangaben:Daniel F. Litim, Theory Division, CERN, CH-1211 Geneva 23, Switzerland; Jan M. Pawlowski, Institut für Theoretische Physik III, Universität Erlangen, D-91054 Erlangen, Germany

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520 |a We study different renormalization group flows for scale-dependent effective actions, including exact and proper-time renormalization group flows. These flows have a simple one-loop structure. They differ in their dependence on the full field-dependent propagator, which is linear for exact flows. We investigate the inherent approximations of flows with a nonlinear dependence on the propagator. We check explicitly that standard perturbation theory is not reproduced. We explain the origin of the discrepancy by providing links to exact flows both in closed expressions and in given approximations. We show that proper-time flows are approximations to Callan-Symanzik flows. Within a background field formalism, we provide a generalized proper-time flow, which is exact. Implications of these findings are discussed. 
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