FIESTA 2: Parallelizeable multiloop numerical calculations
Description
This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018) Abstract The program FIESTA has been completely rewritten. Now it can be used not only as a tool to evaluate Feynman integrals numerically, but also to expand Feynman integrals automatically in limits of momenta and masses with the use of sector decompositions and Mellin–Barnes representations. Other important improvements to the code are complete parallelization (even to multiple computers), high-precision arithmetics (allowing to calculate integrals which were undoable before), new integrators, Spee... Title of program: FIESTA2 Catalogue Id: AECP_v2_0 Nature of problem The sector decomposition approach to evaluating Feynman integrals falls apart into the sector decomposition itself, where one has to minimize the number of sectors; the pole resolution and epsilon expansion; and the numerical integration of the resulting expression. Versions of this program held in the CPC repository in Mendeley Data AECP_v1_0; FIESTA; 10.1016/j.cpc.2008.11.006 AECP_v2_0; FIESTA2; 10.1016/j.cpc.2010.11.025 AECP_v3_0; FIESTA 3; 10.1016/j.cpc.2014.03.015 AECP_v4_0; FIESTA4; 10.1016/j.cpc.2016.03.013