Contact
Name
Simon de Visscher
Position
Former member
PhD student in CP3 from September 2004 to October 2009
Current position: Postdoc at Zürich U.
Dissertations, status,...
June 2004: Graduate diploma.
Dissertation: Analyse de topologies à un lepton dur lors de processus associés à un Higgs se désintégrant en deux bosons W
September 2005: DEA (master) diploma
Report:Identification et sélection des leptons produits lors de la production associée d'un boson de Higgs et d'une paire de quarks top-antitop dans l'expérience CMS
September 2005 - October 2009
PhD Thesis and as research assistant: work related to the modelling of collision in hadron-hadron colliders, on the BSM phenomenology particularly on 2HDM, and associated discovery potentials in general, in CMS in particular
October 2009-...
PostDoc at Universität Zürich (http://www.unipublic.uzh.ch/): ongoing work on CMS pixel commisionning and performance, B-physics, jet matching in CMSSW,...
Projects
I am involved in the following research directions:

MadGraph/MadEvent and FeynRules

Monte Carlo development.

In collaboration with MadGraph and FeynRules teams and many external collaborators

External collaborators: Claude Duhr, Benjamin Fuks, Kentarou Mawatari, Kaoru Hagiwara, Tim Stelzer, Johan Alwall, Stefano Frixione, Roberto Pittau, Valentin Hirshi, Rikkert Frederix.

Observability of a minimal extension of the scalar sectror: 2HDM at the LHC

The goal of this work is to explore the phenomenology of a two Higgs doublet model with a custodial symmetry. It provides topologies that are unusual in the models usually considered in the literature. Notably, it opens the possibility of having an inverted mass spectrum with respect to MSSM with the lightest Higges being a pseudo-scalar and an heavier triplet of charged and neutral higgses.

External collaborators: Simon de Visscher (Zurich university).

Search for Higgs boson(s) in CMS at the LHC

Search for Higgs boson(s) within the Standard Model and beyond and also withing a minimal extension of the scalar sector (2HDM).

The final state under study is a Z decaying into a lepton pair associated with two b-jets. This topology is sensitive to a light SM Higgs via the associate ZH production, as well as a middle mass range SM Higgs boson via the inclusive Higgs production followed by its decay into ZZ with one Z decaying into a lepton pair and the other into bbar.

It is also very sensitive to the production of a non standard heavy Higgs boson decaying into Z plus A (pseudo scalar Higgs boson).

External collaborators: Nick van Remortel (Belgium, UA), Barbara Clerbaux (Belgium, ULB), and CMS collaboration.


Show past projects.
Publications in CP3
Showing 5 publications over 9. Show all publications.
All my publications on SPIRES

2009

Unconventional phenomenology of a minimal two-Higgs-doublet model
Simon de Visscher, Jean-Marc Gerard, Michel Herquet, Vincent Lemaitre, Fabio Maltoni
[Abstract] [PDF] [Journal] Published in JHEP08(2009)042.
Refereed paper. 3rd April.

2008

The CMS experiment at the CERN LHC
The CMS Collaboration
[Journal] [Full text] The CMS Collaboration, "The CMS experiment at the CERN LHC", 2008 JINST 3 S08004, 361pp doi: 10.1088/1748-0221/3/08/S08004.
Refereed paper. 10th December.
The CMS tracker operation and performance at the Magnet Test and Cosmic Challenge
S. Assouak, J.-L. Bonnet, G. Bruno, B. de Callatay, S. de Visscher, D. Favart, B. Florins, E. Forton5, A. Giammanco, G. Gregoire, S. Kalinin, D. Kcira, Th. Keutgen, V. Lemaitre, D. Michotte, O. Militaru, S. Ovyn, K. Piotrzkowski, X. Rouby, D. Teyssier, O. Van der Aa et al. (> 100 authors)
[Journal] [Full text] W. Adam et al., “The CMS tracker operation and performance at the Magnet Test and Cosmic Challenge”, 2008 JINST 3 P07006. doi: 10.1088/1748-0221/3/07/P07006.
G. Bruno co-editor

Refereed paper. 10th December.
QCD radiation in the production of heavy colored particles at the LHC
Johan Alwall, Simon de Visscher, Fabio Maltoni
[Abstract] [PDF] [Journal] Published in JHEP02(2009)017.
Refereed paper. 29th October.
New Developments in MadGraph/MadEvent
J. Alwall, P. Artoisenet, S. de Visscher, C. Duhr, R. Frederix, M. Herquet, O. Mattelaer
[Abstract] [PDF] SUSY08 Proceedings (plenary talk by Johan Alwall)
Contribution to proceedings. 15th September.
Talks outside UCL
23rd September 05:BND Summer school: First look at ttH, H->WW associated productions in CMS
02nd December 05: CERN (Higgs Meeting): search for ttH->WW with two same sign leptons leptons
18th april 2007: Munich (DIS2007): Madgraph/MadEvent at work, from QCD to new physics
25th may 2007: Liege (PHD student day): Study of scalar sector with associated production of Higgs bosons and top quarks.
5th june 2007 : CERN (Top meeting): Production of ttbar + jets samples with MadGraph/MadEvent.
16th july 2007 : CERN (Top meeting): Lastest development of matching in MadGraph/MadEvent.
13th November 2007 : SUSY-GDR workshop: Extra-jet radiations in inclusive SUSY sample and SM backgrounds
February 08: Talks at LCG, Atlas MC meeting: Multi-jet process generation
March 08: CMS generator meeting: status of mas production for CMS

June 08: SUSY08 (Seoul - invited talk): radiation of extra-jet in inclusive SUSY processes
July 08: CERN: radiation of extra-jet in inclusive SUSY processes
December 08: CERN : MadGraph tutorial, running the code and gridpack preparation
Teaching duties
PHY 1113 (I):Mechanics (Ex + Labos) 1q
PHY 1113 (II): Hydrodynamics, Electricity, thermodynamics (Ex + Labo)
PHY 1210: Electromagnetism, waves machanics, modern physics (Ex) 2q
PHYS 2362: Data Processing in Physics 1


[UCLouvain] - [SST] [IRMP] - [SC] [PHYS]
Contact : Vincent Boucher & Jérôme de Favereau
Research
Job opportunities Phd Research Positions in Particle Physics, Phenomenology and Cosmology (Theory)
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