A Technique for generating Feynman Diagrams

Details A Technique for generating Feynman Diagrams A Technique for generating Feynman Diagrams

1995-02-03

arxiv.org/abs/hep-th/9502019v1

Z.Phys. C67 (1995) 343-350

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, LateX, To be published in Z. f. Phys. C

Scientific paper

10.1007/BF01571297

We present a simple technique that allows to generate Feynman diagrams for vector models with interactions of order $2n$ and similar models (Gross-Neveu, Thirring model), using a bootstrap equation that uses only the free field value of the energy as an input. The method allows to find the diagrams to, in principle, arbitrarily high order and applies to both energy and correlation functions. It automatically generates the correct symmetry factor (as a function of the number of components of the field) and the correct sign for any diagram in the case of fermion loops. We briefly discuss the possibility of treating QED as a Thirring model with non-local interaction.

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