Automated higher-order calculations: Status and prospects

TL;DR

This paper reviews the progress and challenges in automated higher-order calculations of scattering amplitudes, focusing on NLO and NNLO methods, and discusses the GoSam framework and integrand-reduction techniques.

Contribution

It provides an overview of current tools and methods for automated NLO and NNLO calculations, highlighting recent developments and future prospects.

Findings

Development of the GoSam framework for NLO calculations

Application of NLO tools to Higgs boson plus jets production

Discussion of integrand-reduction techniques beyond NLO

Abstract

In this presentation we review the current status in the automated evaluation of scattering amplitudes, with particular attention to the developments related with NLO calculations, which led to the construction of powerful multi-purpose computational tools. After a general overview, we will devote a short section to describe the GoSam framework for NLO calculations and its application to the production of Higgs boson plus jets. We will then briefly comment on the challenges presented by NNLO calculations, whose structure is considerably more complicated. Finally, we will describe some of the features of the integrand-reduction techniques beyond NLO, an alternative promising approach to multi-loop calculations which is currently under development.