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FIESTA 2: Parallelizeable multiloop numerical calculations

A.V. Smirnov
V.A. Smirnov
M. Tentyukov
Journal / Anthology

Computer Physics Communications
Year: 2011
Volume: 182
Issue: 3
Page range: 790-803

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, Speer sectors as a strategy, the possibility to evaluate more general parametric integrals.