Automated calculations for multi-leg processes

TL;DR

This paper discusses the development of automated computational methods for calculating complex multi-leg scattering amplitudes crucial for analyzing high-multiplicity final states at the LHC, aiming to enhance precision in new physics searches.

Contribution

It introduces approaches to automate next-to-leading order calculations for multi-leg processes, addressing the complexity of high-multiplicity scattering amplitude computations.

Findings

Automated methods improve calculation efficiency.

Enhanced precision for LHC process predictions.

Facilitation of new physics signal analysis.

Abstract

The search for signals of new physics at the forthcoming LHC experiments involves the analysis of final states characterised by a high number of hadronic jets or identified particles. Precise theoretical predictions for these processes require the computation of scattering amplitudes with a large number of external particles and beyond leading order in perturbation theory. The complexity of a calculation grows with the number of internal loops as well as with the number of external legs. Automatisation of at least next-to-leading order calculations for LHC processes is therefore a timely task. I will discuss various approaches.