Contact
Name
Olivier Mattelaer

Position
Research scientist

Email
olivier.mattelaer@uclouvain.be

Address
Centre for Cosmology, Particle Physics and Phenomenology - CP3
Université catholique de Louvain
2, Chemin du Cyclotron - Box L7.01.05
B-1348 Louvain-la-Neuve
Belgium

Phone
+32 10 472010 (CP3)

Office
E.357

UCL member card
http://www.uclouvain.be/olivier.mattelaer
Formation
CECI Formation
- ssh
- Object Oriented in C++
- Container on HPC with Singularity
- Checkpointing
- Code versioning

MadGraph5
- Lecture
- Tutorial
Particle physics Review
Automated Computation of One-Loop Amplitudes
freely accessible from this link:
https://www.annualreviews.org/doi/full/10.1146/annurev-nucl-101917-020959




People responsibilities
Postdocs
Luigi Favaro (IISN - MaxLHC) (member since November 2024)
My research focus is the application of modern machine learning techniques to enable new discoveries in High Energy Physics. My work includes the application of generative networks for model-agnostic searches, fast detector simulation, and unfolding detector effects. I am also interested in uncertainty quantification and the usage of predicted uncertainties in HEP.
Theo Heimel (Other - WEAVE) (member since October 2024)
The main focus of my research is accelerating event generation for the High-Luminosity LHC and beyond using generative networks. In particular, the MadNIS project aims to make sampling hard-scattering events in MadGraph faster using neural importance sampling. Furthermore, I am interested in ML-based methods to extract more information from LHC data. This includes unfolding with generative networks, simulation-based inference, and combining machine-learned detector effects with theory knowledge in the matrix element method.

PhD students

Master students

Former members
Projects
Research directions:
Data analysis in HEP, astroparticle and GW experiments
Phenomenology of elementary particles
Theories of the fundamental interactions

Experiments and collaborations:
CMS

Active projects
Loop-induced processes in the SM and Beyond
Fabio Maltoni, Olivier Mattelaer

Automation within MadGraph5_aMC@NLO and phenomenological studies of loop-induced processes for the LHC
MadGraph5_aMC@NLO
Fabio Maltoni, Olivier Mattelaer

Monte Carlo development.

External collaborators: Benjamin Fuks, Kentarou Mawatari, Kaoru Hagiwara, Tim Stelzer, Stefano Frixione, Marco Zaro, Rikkert Frederix, Valentin Hirschi, Paolo Torrielli, Johan Alwall, Hua-Sheng Shao, Mihailo Backovic,...

Non-active projects
Publications in IRMP
All my publications on Inspire

Number of publications as IRMP member: 43
Last 5 publications

2024

IRMP-CP3-24-23: Differentiable MadNIS-Lite
Heimel, Theo and Mattelaer, Olivier and Plehn, Tilman and Winterhalder, Ramon

[Abstract] [PDF]
July 26.
IRMP-CP3-24-12: Automatic generation of helicity amplitudes in Feynman-Diagram gauge
Haigiwara, Kaoru and Kanzaki, Junichi and Mattelaer, Olivier and Mawatari, Kentarou and Zheng, Ya-Juan

[Abstract] [PDF] [Journal] [Dial]
Refereed paper. April 23.
IRMP-CP3-24-11: Boosting Beyond: A Novel Approach to Probing Top-Philic Resonances at the LHC
Luc Darmé, Benjamin Fuks, Hao-Lin Li, Matteo Maltoni, Olivier Mattelaer, and Julien Touchèque

[Abstract] [PDF] [Local file]
Letter, detailed paper will follow
April 22.

2023

IRMP-CP3-23-56: The MadNIS Reloaded
Heimel, Theo and Huetsch, Nathan and Maltoni, Fabio and Mattelaer, Olivier and Plehn, Tilman and Winterhalder, Ramon

[Abstract] [PDF] [Journal] [Dial]
Published in SciPost Phys. 17, 023 (2024)
Refereed paper. October 7.
IRMP-CP3-23-26: UFO 2.0 -- The Universal Feynman Output format
Darm\'e, Luc and others

[Abstract] [PDF] [Journal]
Refereed paper. June 30.

More publications