Speaker
Ramon Winterhalder
(UC Louvain)
Description
Numerical evaluations of Feynman integrals often proceed via a deformation of the integration contour into the complex plane. While valid contours are easy to construct, the numerical precision for a multi-loop integral can depend critically on the chosen contour. We present methods to optimize this contour using a combination of optimized, global complex shifts and a normalizing flow. They can lead to a significant gain in precision.
Authors
Ramon Winterhalder
(UC Louvain)
Vitalii Maheria
Emilio Villa
(Karlsruhe Institute of Technology)
Stephen Philip Jones
(University of Durham (GB))
Matthias Kerner
(University of Zürich)
Anja Butter
Gudrun Heinrich
(KIT)
Tilman Plehn
