The Gauge Invariant ERG

Details The Gauge Invariant ERG The Gauge Invariant ERG

2004-09-03

arxiv.org/abs/hep-th/0409042v2

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, 1 figure. Proceeding of Quarks-2004, Pushkinskie Gory, Russia, May 24-30. v2: minor corrections compared to publishe

Scientific paper

We sketch the construction of a gauge invariant Exact Renormalization Group (ERG). Starting from Polchinski's equation, the emphasis is on how a series of ideas have combined to yield the gauge invariant formalism. A novel symmetry of the ERG allows the flow equation to be modified, in such a way that it is suitable for the computation of the (universal) two-loop beta-function. This computation has now been performed, within the framework of the ERG and, as such, in a manifestly gauge invariant way for the very first time.

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