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Report number arXiv:1809.10698 ; CP3-18-58 ; CERN-TH-2018-211 ; HU-Mathematik-2018-09 ; HU-EP-18/29 ; SLAC-PUB-17336
Title Elliptic Feynman integrals and pure functions
Author(s) Broedel, Johannes (Humboldt U., Berlin) ; Duhr, Claude (CERN ; Louvain U., CP3) ; Dulat, Falko (SLAC) ; Penante, Brenda (CERN) ; Tancredi, Lorenzo (CERN)
Publication 2019-01-03
Imprint 2018-09-27
Number of pages 47
Note 47 pages
In: JHEP 1901 (2019) 023
DOI 10.1007/JHEP01(2019)023
Subject category hep-th ; Particle Physics - Theory
Abstract We propose a variant of elliptic multiple polylogarithms that have at most logarithmic singularities in all variables and satisfy a differential equation without homogeneous term. We investigate several non-trivial elliptic two-loop Feynman integrals with up to three external legs and express them in terms of our functions. We observe that in all cases they evaluate to pure combinations of elliptic multiple polylogarithms of uniform weight. This is the first time that a notion of uniform weight is observed in the context of Feynman integrals that evaluate to elliptic polylogarithms.
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preprint: (License: arXiv nonexclusive-distrib 1.0)



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