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Two-loop diagrams in nonrelativistic QCD with elliptics

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Kniehl, B.A. ; Kotikov, A.V. ; Onishchenko, A.I. ; Veretin, O.L.
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 06 Apr 2021 11:27


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 ...


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