Symmetry factors of Feynman diagrams and the homological perturbation lemma

Christian Saemann; Emmanouil Sfinarolakis

doi:10.1007/JHEP12(2020)088

Symmetry factors of Feynman diagrams and the homological perturbation lemma

Christian Saemann, Emmanouil Sfinarolakis

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Abstract

We discuss the symmetry factors of Feynman diagrams of scalar field theories with polynomial potential. After giving a concise general formula for them, we present an elementary and direct proof that when computing scattering amplitudes using the homological perturbation lemma, each contributing Feynman diagram is indeed included with the correct symmetry factor.

Original language	English
Article number	88
Journal	Journal of High Energy Physics
DOIs	https://doi.org/10.1007/JHEP12(2020)088
Publication status	Published - 14 Dec 2020

Keywords

hep-th
math-ph
math.MP

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Symmetry factors of Feynman diagrams and the homological perturbation lemma

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