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Gauge-invariant truncation scheme for the Schwinger-Dyson equations of QCD

Research paper by Daniele Binosi, Joannis Papavassiliou

Indexed on: 17 Dec '07Published on: 17 Dec '07Published in: High Energy Physics - Phenomenology



Abstract

We present a new truncation scheme for the Schwinger-Dyson equations of QCD that respects gauge invariance at any level of the dressed loop expansion. When applied to the gluon self-energy, it allows for its non-perturbative treatment without compromising the transversality of the solution, even when entire sets of diagrams (most notably the ghost loops) are omitted, or treated perturbatively.