Abstract
General prescriptions for evaluating coefficients at arbitrary powers and logarithms in the asymptotic expansion of Feynman diagrams in the Sudakov limit are discussed and illustrated with two-loop examples. Peculiarities connected with the evaluation of individual terms in the expansion, in particular, the introduction of an auxiliary analytic regularization, are characterized.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 120, No. 1, pp. 64–71, July, 1999.
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Smirnov, V.A., Rakhmetov, E.R. The regional strategy in the asymptotic expansion of two-loop vertex feynman diagrams. Theor Math Phys 120, 870–875 (1999). https://doi.org/10.1007/BF02557396
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DOI: https://doi.org/10.1007/BF02557396