Precise predictions for LHC using a GOLEM

TL;DR

This paper presents advanced NLO calculations for LHC processes using the GOLEM method, enabling efficient amplitude representations and phase space integration for complex multi-leg reactions.

Contribution

It introduces the application of the GOLEM method to compute NLO corrections for specific LHC processes, improving computational efficiency and accuracy.

Findings

Efficient phase space integration for complex amplitudes

Successful application to gg -> Z*Z* process

Reweighting technique for leading order events

Abstract

In this talk we present recent next-to-leading order results relevant for LHC phenomenology obtained with the GOLEM method. After reviewing the status of this Feynman diagrammatic approach for multi-leg one-loop calculations we discuss three applications: the loop-induced process gg -> Z^*Z^* and the virtual corrections to the five and six point processes qq -> ZZg and u ubar -> s sbar c cbar. We demonstrate that our method leads to representations of such amplitudes which allow for efficient phase space integration. In this context we propose a reweighting technique of the leading order unweighted events by local K-factors.