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arXiv · 2211.06448

Screened massive expansion of Schwinger-Dyson equations

Fabio Siringo
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Abstract

A general formal derivation of the screened massive expansion is provided by Schwinger-Dyson equations. Some known issues of the expansion are clarified and a more general framework is established for a natural extension of the method to two-loop or to amplitudes which are not directly defined by a generating functional. For instance, a one-loop screened expansion is given for the effective gauge-parameter-independent gluon propagator which arises from the pinch-technique.

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Fabio Siringo. 2022-11-11. Screened massive expansion of Schwinger-Dyson equations. https://doi.org/10.1103/physrevd.107.016009

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