Two-loop diagrams in nonrelativistic QCD with elliptics

URN to cite this document:: urn:nbn:de:bvb:355-epub-454888
DOI to cite this document:: 10.5283/epub.45488

Kniehl, B. A. ; Kotikov, A. V. ; Onishchenko, A. I.

; Veretin, O. L.

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Date of publication of this fulltext: 06 Apr 2021 11:27

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Abstract

We consider two-loop two-, three-, and four-point diagrams with elliptic subgraphs involving two different masses, m and M. Such diagrams generally arise in matching procedures within nonrelativistic QCD and QED and are relevant, e.g., for top-quark pair production at threshold and parapositronium decay. We present the obtained results in several different representations: series solution with ...