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An arbitrary term of the epsilon-expansion of dimensionally regulatedoff-shell massless one-loop three-point Feynman diagram is expressed in termsof log-sine integrals related to the polylogarithms. Using magic connectionbetween these diagrams and two-loop massive vacuum diagrams, theepsilon-expansion of the latter is also obtained, for arbitrary values of themasses. The problem of analytic continuation is also discussed.Comment: 8 pages, late

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Explicit results for all orders of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ɛ</mml:mi></mml:math>expansion of certain massive and massless diagrams

Explicit results for all orders of theɛexpansion of certain massive and massless diagrams