FIESTA4: Optimized Feynman integral calculations with GPU support

Published: 01-07-2016| Version 1 | DOI: 10.17632/rrmkzgpznb.1
Alexander Smirnov


This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018) Abstract This paper presents a new major release of the program FIESTA (Feynman Integral Evaluation by a Sector decomposiTion Approach). The new release is mainly aimed at optimal performance at large scales when one is increasing the number of sampling points in order to reduce the uncertainty estimates. The release now supports graphical processor units (GPUs) for the numerical integration, methods to optimize cluster-usage, as well as other speed, memory, and stability improvements. Title of program: FIESTA4 Catalogue Id: AECP_v4_0 Nature of problem The sector decomposition approach to evaluating Feynman in- tegrals 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. Morover, 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