Loop expansion of the average effective action in the functional renormalization group approach

Abstract

We formulate a perturbation expansion for the effective action in a new approach to the functional renormalization group method based on the concept of composite fields for regulator functions being their most essential ingredients. We demonstrate explicitly the principal difference between the properties of effective actions in these two approaches existing already on the one-loop level in a simple gauge model.

Original language	English
Article number	085038
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	92
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevD.92.085038
Publication status	Published - 26 Oct 2015

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.92.085038

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abstract = "We formulate a perturbation expansion for the effective action in a new approach to the functional renormalization group method based on the concept of composite fields for regulator functions being their most essential ingredients. We demonstrate explicitly the principal difference between the properties of effective actions in these two approaches existing already on the one-loop level in a simple gauge model.",

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