TVID 2: Evaluation of planar-type three-loop self-energy integrals with arbitrary masses
Abstract
We present TVID 2, a program to numerically evaluate an important class of planar three-loop self-energy master integrals with arbitrary masses. As with the predecessor version (TVID 1) the integrals are separated into a known piece, containing the UV divergencies, and a finite piece that is integrated numerically, implemented in C. The set of master integrals under consideration was found with self-energy diagrams containing two closed fermion loops in mind. Two techniques are employed in deriving the expressions for the finite pieces that are then numerically integrated: (a) Sub-loop dispersion relations in the case of topologies containing sub-bubbles, and (b) a modification of the procedure suggested by Ghinculov for integrals with only sub-loop triangles.
Cite
@article{arxiv.1908.09887,
title = {TVID 2: Evaluation of planar-type three-loop self-energy integrals with arbitrary masses},
author = {Stefan Bauberger and Ayres Freitas and Daniel Wiegand},
journal= {arXiv preprint arXiv:1908.09887},
year = {2020}
}
Comments
26 pages, 3 figures, 5 tables. Code available at http://www.pitt.edu/~afreitas/