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Durham e-Theses
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The automated calculation of Feynman diagrams in affine Toda field theory

Bayton, Paul (1994) The automated calculation of Feynman diagrams in affine Toda field theory. Doctoral thesis, Durham University.

[img]Archive (ZIP) (Thesis 1994/BAY Bayton, Paul)


The purpose of this thesis is to calculate the residues of the poles of S matrix elements in the d(_6), e(_6), e(_7) and e(_8) Affine Toda Field theories. We will use the standard method of Feynman graphs in perturbation theory to calculate these results. Since there can be very many graphs, we will automate both the generation of these graphs and their subsequent calculation by the use of computer programs. This is the first ever machine calculation of residues in Toda Field theory. Affine Toda Field Theory has been studied in great depth for its integrability properties, and comparison will be made between the results we have generated, and the so called "exact" S matrices obtained by bootstrap and other properties. The results for the second and third order poles at positions predicted by the exact S matrix are tabulated for all of the algebras studied. In addition, for e(_6) all of the second and third order poles are tabulated regardless of the exact S matrix. The Feynman diagrams for the fourth order poles in d(_6) are generated, and the problem of calculating them is discussed.

Item Type:Thesis (Doctoral)
Award:Doctor of Philosophy
Thesis Date:1994
Copyright:Copyright of this thesis is held by the author
Deposited On:16 Nov 2012 11:00

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