A General Expression for Symmetry Factors of Feynman Diagrams

Details A General Expression for Symmetry Factors of Feynman Diagrams A General Expression for Symmetry Factors of Feynman Diagrams

2001-08-13

arxiv.org/abs/hep-th/0108088v1

Can.J.Phys. 80 (2002) 847-854

Physics

High Energy Physics

High Energy Physics - Theory

RevTex 11 pages with 10 figures

Scientific paper

10.1139/p02-006

The calculation of the symmetry factor corresponding to a given Feynman
diagram is well known to be a tedious problem. We have derived a simple formula
for these symmetry factors. Our formula works for any diagram in scalar theory
($\phi^3$ and $\phi^4$ interactions), spinor QED, scalar QED, or QCD.

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