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The strategy of regions for asymptotic expansion of two-loop vertex Feynman diagrams
classification
✦ hep-ph
hep-th
keywords
expansionasymptoticdiagramsevaluationfeynmantwo-loopanalyticarbitrary
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General prescriptions for evaluation of coefficients at arbitrary powers and logarithms in the asymptotic expansion of Feynman diagrams in the Sudakov limit are discussed and illustrated by two-loop examples. Peculiarities connected with evaluation of individual terms of the expansion, in particular, the introduction of auxiliary analytic regularization, are characterized.
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Cited by 1 Pith paper
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The Fate of Ultra-Collinear Modes in On-Shell Massive Sudakov Form Factors
Ultra-collinear modes cancel to all orders in on-shell massive Sudakov form factors by gauge invariance, preserving SCET_II factorization, with explicit two-loop soft and jet functions computed via eta regulator and N...
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