FIESTA 3: Cluster-parallelizable multiloop numerical calculations in physical regions
Description
This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018) Abstract The goal of this paper is to present a new major release of the program FIESTA (Feynman Integral Evaluation by a Sector decomposiTion Approach). This version presents features like cluster-parallelization, new asymptotic expansion algorithms, calculations in physical regions, new sector-decomposition strategies, as well as multiple speed, memory, and stability improvements. Title of program: FIESTA 3 Catalogue Id: AECP_v3_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. Moreover, in cases where the integrand is complex, one has to perform a contour deformation. 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