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Counting tree diagrams: asymptotic results for QCD-like theories

  • Theoretical physics
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The European Physical Journal C - Particles and Fields Aims and scope Submit manuscript

Abstract

We discuss the enumeration of Feynman diagrams at tree order for processes with external lines of different types. We show how this can be done by iterating algebraic Schwinger–Dyson equations. Asymptotic estimates for very many external lines are derived. Applications include QED, QCD and scalar QED, and the asymptotic estimates are numerically confronted with the exact results.

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Authors and Affiliations

  1. University of Nijmegen, 6500 GI, Nijmegen, The Netherlands

    P. Draggiotis & R. Kleiss

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  1. P. Draggiotis
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  2. R. Kleiss
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Correspondence to P. Draggiotis.

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Draggiotis, P., Kleiss, R. Counting tree diagrams: asymptotic results for QCD-like theories. Eur. Phys. J. C 23, 701–706 (2002). https://doi.org/10.1007/s100520200889

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  • DOI: https://doi.org/10.1007/s100520200889

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