NLO Cross Sections for the LHC using GOLEM: Status and Prospects

TL;DR

This paper discusses the GOLEM approach for calculating next-to-leading order (NLO) cross sections at the LHC, emphasizing an automated, stable method for virtual corrections in complex processes.

Contribution

It introduces an automated implementation of the GOLEM technique, extending the golem95 library to compute virtual corrections for multi-particle processes.

Findings

Extended golem95 library with automated matrix element generator

Successfully interfaced virtual corrections with Monte Carlo programs

Achieved stable NLO calculations for complex LHC processes

Abstract

In this talk we review the GOLEM approach to one-loop calculations and present an automated implementation of this technique. This method is based on Feynman diagrams and an advanced reduction of one-loop tensor integrals which avoids numerical instabilities. We have extended our one-loop integral library golem95 with an automated one-loop matrix element generator to compute the virtual corrections of the process $q\bar{q}\to b\bar{b}b\bar{b}$. The implementation of the virtual matrix element has been interfaced with tree-level Monte Carlo programs to provide the full result for the above process.