Pierre Artoisenet
Former member
Postdoc in CP3 from May 2014
Past projects
Hide past projects.

I am involved in the following research directions:

Advanced Techniques for Fast Simulation and Data Analysis in High Energy Physics (ASAP)

The discovery of the 125GeV Higgs boson by the LHC experiments has finally opened a new era in the exploration of the TeV scale. The physics programs of CMS and ATLAS aim far beyond the simple discovery, and vigorously pursue the full characterization of the newly discovered state and the full exploration of the TeV scale in search of new phenomena. A key lesson drawn from first two years of LHC running is that most probably first discoveries and then identification of new states/interactions will not be easy. On the one hand, model-independent searches in simple topologies such as single/multi lepton at high transverse momenta have not shown any hint of new physics so far. On the other, topologies with jets and/or missing transverse energies, much more challenging experimentally, do strongly depend on the underlying theoretical models so that efficiently identifying signal enhanced regions of the phase space is quite involved. In this context, multi-variate techniques have become more and more central in the analysis of data from hadron collider experiments, to maximally exploit the information available on the signal and on the backgrounds. Amongst the most advanced techniques and certainly the most powerful one from the theoretical point of view, the so called matrix element method stands out. The main goal of this proposal is to advance the use and the scope of the matrix-element method so to significantly extend the range of physics applications at the LHC to the search of new physics. First we aim at providing the experimental HEP community with complete and automatic simulation tools, such as MadWeight/MoMEMta and Delphes, that overcome the technical limitations of the method. Second we propose to test and apply the new tools to current analyses in signatures that involve final state leptons and b-jets. Finally, we explore new and original applications of the method to both model-dependent or model-independent searches of new physics at the LHC.

External collaborators: CMS collaboration.

Automatic Matrix Element method and associated analyses techniques

Madweight is a algorithm to automatically reweight experimental events with the squared matrix element, and therefore provides the required computation techniques for a practical application of the matrix element method.

We also study the usefullness of MadWeight to estimate differential cross-section Formula: 0 via the marginal distributions of the the experimental weights Formula: 1.

External collaborators: Pierre Artoisenet (Ohio state university).


Production and decay of bound states of heavy quarks. Phenomenology and MC tools (MadOnia).

External Collaborators:
P. Artoisenet (Ohio), T. Stelzer (UIUC), J.P. Lansberg (Univ. Friburg, Germany), J. Campbell (Glasgow, UK), F. Tramontano (Univ. Napoli, Italy),...

Publications in CP3
All my publications on Inspire


Gluon fragmentation into quarkonium at next-to-leading order using FKS subtraction
Pierre Artoisenet, Eric Braaten
to be sent to JHEP
Refereed paper. 30th September.


Gluon fragmentation into quarkonium at next-to-leading order
Pierre Artoisenet and Eric Braaten
[Abstract] [PDF] [Journal] submitted to JHEP
Refereed paper. 9th December.


Automation of the matrix element reweighting method
Pierre Artoisenet, Vincent Lemaître, Fabio Maltoni, Olivier Mattelaer
[Abstract] [PDF] [Journal] Published in JHEP12(2010)068
Refereed paper. 19th July.


Charm-pair Rescattering Mechanism for Charmonium Production in High-energy Collisions
Pierre Artoisenet, Eric Braaten
[Abstract] [PDF] [Journal] 12 pages, accepted in PRD
Refereed paper. 30th June.
Parton Model Calculation of Inclusive Charm Production by a Low-energy Antiproton Beam
E. Braaten, P. Artoisenet
[Abstract] [PDF] [Journal] 8 pages, 4 figures, Published in PRD
Refereed paper. 17th March.
J/psi production at HERA
Pierre Artoisenet, John Campbell, Fabio Maltoni, Francesco Tramontano
[Abstract] [PDF] [Journal] 4 pages, 2 figures. Published in Phys. Rev. Lett. 102, 142001 (2009)
Refereed paper. 27th January.


Improved predictions for J/psi and Upsilon production
P. Artoisenet
[Full text] Proceedings of the 8th Conference on Quark Confinement and the Hadron Spectrum, September 1-6 2008
Contribution to proceedings. 14th December.
MadWeight: automatic event reweighting with matrix elements
Pierre Artoisenet, Olivier Mattelaer
[Full text] Charged Higgs 2008 (Uppsala) presented by O. Mattelaer
Contribution to proceedings. 28th November.
New Developments in MadGraph/MadEvent
J. Alwall, P. Artoisenet, S. de Visscher, C. Duhr, R. Frederix, M. Herquet, O. Mattelaer
[Abstract] [PDF] [Journal] SUSY08 Proceedings (plenary talk by Johan Alwall)
Contribution to proceedings. 15th September.
Improved predictions for Upsilon hadroproduction
P. Artoisenet
[Journal] [Full text] Presented at the XVI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS08), April 08.
Contribution to proceedings. 28th June.
QCD corrections to heavy quarkonium production
P. Artoisenet
[Full text] Presented at the Joint Meeting HLPW08, March 6-8 2008, Spa, Belgium.
Contribution to proceedings. 28th June.
Upsilon production at the Tevatron and the LHC
P. Artoisenet, J. Campbell, J.P. Lansberg, F. Maltoni, F. Tramontano
[Abstract] [PDF] [Journal] Published in PRL 101 (2008) 152001
Refereed paper. 18th June.


J/psi production in association with a charm-quark pair at the Tevatron
Pierre Artoisenet
[Abstract] [PDF] Proceedings of the Ninth Workshop on Non-Perturbative Quantum Chromodynamics.
Contribution to proceedings. 7th December.
Automatic generation of quarkonium amplitudes in NRQCD
Pierre Artoisenet, Fabio Maltoni, Tim Stelzer
[Abstract] [PDF] [Journal] Published in JHEP02 (2008) 102
Refereed paper. 22nd November.
Hadroproduction of J/psi and Y in association with a heavy-quark pair
P. Artoisenet, J.P. Lansberg, F. Maltoni
[Abstract] [PDF] [Journal] Published in Phys. Lett. B653:60-66,2007
Refereed paper. 12th March.


Survival before annihilation in Psi-prime decays
Artoisenet, P. and Gerard, J. -M. and Weyers, J.
[Abstract] [PDF] [Journal] Published in Phys. Lett. B628 (2005) 211-214
Refereed paper. 30th June.

[UCLouvain] - [SST] [IRMP] - [SC]
Contact : Jérôme de Favereau
Job opportunities Postdoctoral Position on the CMS tracker upgrade for HL-LHC
EOS be.h : 10 PhD positions