GoSam-2.0: a tool for automated one-loop calculations within the Standard Model and beyond

TL;DR

GoSam-2.0 is an advanced software tool that automates one-loop amplitude calculations for particle physics processes within and beyond the Standard Model, featuring improved performance and extended capabilities.

Contribution

The paper introduces GoSam-2.0, a significantly enhanced version with better efficiency, accuracy, and broader applicability for automated one-loop calculations in particle physics.

Findings

Improved computational speed and numerical accuracy.

Extended applicability to a wider range of processes.

Enhanced interface with Monte Carlo programs.

Abstract

We present the version 2.0 of the program package GoSam for the automated calculation of one-loop amplitudes. GoSam is devised to compute one-loop QCD and/or electroweak corrections to multi-particle processes within and beyond the Standard Model. The new code contains improvements in the generation and in the reduction of the amplitudes, performs better in computing time and numerical accuracy, and has an extended range of applicability. The extended version of the "Binoth-Les-Houches-Accord" interface to Monte Carlo programs is also implemented. We give a detailed description of installation and usage of the code, and illustrate the new features in dedicated examples.