FIESTA4: Optimized Feynman integral calculations with GPU support

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