# Automated event generation for loop-induced processes

@article{Hirschi2015AutomatedEG,
title={Automated event generation for loop-induced processes},
author={Valentin Hirschi and Olivier Mattelaer},
journal={Journal of High Energy Physics},
year={2015},
volume={2015},
pages={1-34}
}
• Published 30 June 2015
• Physics
• Journal of High Energy Physics
A bstractWe present the first fully automated implementation of cross-section computation and event generation for loop-induced processes. This work is integrated in the MadGraph5_aMC@NLO framework. We describe the optimisations implemented at the level of the matrix element evaluation, phase space integration and event generation allowing for the simulation of large multiplicity loop-induced processes. Along with some selected differential observables, we illustrate our results with a table…
112 Citations

## Figures and Tables from this paper

The automation of next-to-leading order electroweak calculations
• Physics
• 2018
A bstractWe present the key features relevant to the automated computation of all the leading- and next-to-leading order contributions to short-distance cross sections in a mixed-coupling expansion,
Dark-matter production through loop-induced processes at the LHC: the s-channel mediator case
• Physics, Medicine
The European physical journal. C, Particles and fields
• 2015
We show how studies relevant for mono-X searches at the LHC in simplified models featuring a dark-matter candidate and an s-channel mediator can be performed within the MadGraph5_aMC@NLO framework.
Automation of higher order corrections and their applications Beyond the Standard Model
• Physics
• 2016
This thesis is centred around GoSam 2.0, a framework for the automated calculation of one-loop corrections. Various improvements have been developed and implemented, including a standardized
Indirect dark-matter detection with MadDM v3.2 -- Lines and Loops
• Physics
• 2021
Automated tools for the computation of particle physics’ processes have become the backbone of phenomenological studies beyond the standard model. Here, we present MadDM v3.2. This release enables
Measurements of ZZ production with the ATLAS detector and simulation of loop-induced processes with the HERWIG event generator
This thesis presents results and method developments in both experimental and theoretical particle physics. The main part shows measurements of $\ell^+\ell^-\ell'^+\ell'^-$ production (where $\ell$,
Higher-order QCD predictions for dark matter production in mono-Z searches at the LHC
• Physics
• 2015
A bstractWe present theoretical predictions for mono-Z production in the search for dark matter in Run-II at the LHC, including next-to-leading order QCD corrections and parton-shower effects. We
On the maximal use of Monte Carlo samples: re-weighting events at NLO accuracy
• O. Mattelaer
• Physics, Mathematics
The European physical journal. C, Particles and fields
• 2016
A method that allows to consistently re-use parton-level samples accurate up to NLO in QCD under different theoretical hypotheses is described and its validation is shown by applying it to several cases of practical interest for the search of new physics at the LHC.
Parton shower and NLO-matching uncertainties in Higgs boson pair production
• Physics
• 2017
A bstractWe perform a detailed study of NLO parton shower matching uncertainties in Higgs boson pair production through gluon fusion at the LHC based on a generic and process independent
NLO predictions for the production of a (750 GeV) spin-two particle at the LHC
• Physics
• 2016
We obtain predictions accurate at the next-to-leading order in QCD for the production of a generic spin-two particle in the most relevant channels at the LHC: production in association with colored
Higgs-pair production via gluon fusion at hadron colliders: NLO QCD corrections
Higgs-pair production via gluon fusion is the dominant production mechanism of Higgs-boson pairs at hadron colliders. In this work, we present details of our numerical determination of the full

## References

SHOWING 1-10 OF 126 REFERENCES
• Physics
• 2002
We present a new multi-channel integration method and its implementation in the multi-purpose event generator MadEvent, which is based on MadGraph. Given a process, MadGraph automatically identifies
We present the latest developments of the MadGraph/MadEvent Monte Carlo event generator and several applications to hadron collider physics. In the current version events at the parton, hadron and
A brief introduction to PYTHIA 8.1
• Physics, Computer Science
Comput. Phys. Commun.
• 2008
PYTHIA 8 represents a complete rewrite in C++, and does not yet in every respect replace the old code, but does contain some new physics aspects that should make it an attractive option especially for LHC physics studies.
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
A bstractWe discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and
Event generation with SHERPA 1.1
In this paper the current release of the Monte Carlo event generator Sherpa, version 1.1, is presented. Sherpa is a general-purpose tool for the simulation of particle collisions at high-energy
Automated one-loop calculations with GoSam
We present the program package GoSam which is designed for the automated calculation of one-loop amplitudes for multi-particle processes in renormalisable quantum field theories. The amplitudes,
Production of γZg and associated processes via gluon fusion at hadron colliders
• Physics
• 2013
A bstractWe present results for the process gg → γZg within the standard model at hadron colliders. Due to a large gluon flux at the LHC and the proposed HE-LHC, this process can have significant
PYTHIA 6.2: Physics and manual
• Physics
• 2001
The PYTHIA program can be used to generate high-energy-physics `events', i.e. sets of outgoing particles produced in the interactions between two incoming particles. The objective is to provide as
DELPHES 3: a modular framework for fast simulation of a generic collider experiment
AbstractThe version 3.0 of the Delphes fast-simulation is presented. The goal of Delphes is to allow the simulation of a multipurpose detector for phenomenological studies. The simulation includes a
Herwig++ physics and manual
AbstractIn this paper we describe $\mathsf{Herwig++}$ version 2.2, a general-purpose Monte Carlo event generator for the simulation of hard lepton-lepton and hadron-hadron collisions. A number of