Application of the DRA method to the calculation of the four-loop QED-type tadpoles

Abstract

We apply the DRA method to the calculation of the four-loop `QED-type' tadpoles. For arbitrary space-time dimensionality D the results have the form of multiple convergent sums. We use these results to obtain the epsilon-expansion of the integrals around D=3 and D=4.

arXiv commentReferences added, some typos corrected. Results unchanged

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