pySecDec as a tool for expansion by regions and loop amplitude evaluation

TL;DR

pySecDec's latest version introduces automated expansion by regions and efficient evaluation of linear combinations of integrals, enhancing its capabilities for calculating scattering amplitudes in quantum field theory.

Contribution

The paper presents new automated expansion by regions and an improved algorithm for evaluating linear combinations of integrals in pySecDec.

Findings

Automated expansion by regions implemented in pySecDec.

New algorithm improves evaluation efficiency of linear integral combinations.

Enhanced tool facilitates complex scattering amplitude calculations.

Abstract

We present the new release of pySecDec, a toolbox for the evaluation of dimensionally regulated parameter integrals. The main new features consist of an automated way to perform expansions, based on the geometric approach to the method of expansion by regions, and a new algorithm to efficiently evaluate linear combinations of integrals as needed for the calculation of scattering amplitudes. The other new features are also summarised briefly.