Christophe Clement

	Fysikum, Stockholms Universitet Physics department, Stockholm University Elementary Particle Physics group

	Christophe Clement Stockholms Universitet - Fysikum S-106 91 Stockholm, Sweden Office: A4:1007 Telephone: +46 (0)8 5537 8658

Research	Currently my main research activity is the data analysis of the high energy proton-proton collisions from the ATLAS experiment at the CERN LHC collider. Theoretically we know that the current Standard Model of particle physics functions well only up to an energy of 1TeV (1000 times the mass of the proton or a size 1000 times smaller than the proton). From cosmological studies we also know that Dark Matter could be explained by the presence of new particles in this energy range. The ATLAS experiment allows us to put to the test a variety of theories, far more than what a single physicist can ever hope to do in its own lifetime. I am personally particularly interested in the links between particle physics and the Dark Matter problem. So I am focusing my efforts on the search for New Physics Phenomena which could appear in the proton-proton collisions recorded by ATLAS and which could be related to the Dark Matter question. Various new particles have been proposed as Dark Matter candidates and many of them could actually be produced in the lab at CERN and be detected by the ATLAS experiment. Such new particles can appear for instance in models with Supersymmetry or Extra-dimensions. So the coming years of data analysis with ATLAS are very very interesting... I am directly working on the analysis of collision data, currently searching for Supersymmetry (SUSY) in dilepton final states and developing new techniques to separate it against the main background, namely top-quark pair production as well as other experimental issues related to the search for Supersymmetry. I am currently investigating the link between the SUSY models excluded by ATLAS and current cosmological bounds on Dark Matter. I am also working on the energy and time calibration of the ATLAS Tile Calorimeter, which is used to measure the energy of hadrons in ATLAS and is a crucial instrument to search for Supersymmetry or extra-dimensions in the collisions recorded by ATLAS.

Earlier Research	I was earlier (2008-early 2010) responsible for the overall commissioning and data taking of the entire ATLAS experiment, and had similar but more limited responsabilities with the installation and commissioning of the ATLAS Tile Calorimeter in the interval 2006-2008. In the interval 2001-2006 I was working on the DZero experiment at Fermilab and particularly on the measurements of the properties of the top quark. Among other things this resulted in a work in collaboration with Per Hansson from KTH in the first experimental determination of the charge top quark. Prior to 2001, I was a PhD student at KTH where I worked on the determination of the performance of ATLAS pre-sampler prototype detectors and I also contributed to its final production, and also studied Supersymmetry scenarios in which R-parity is not conserved.

E-mail	clement @ fysik.su.se

Group	Elementary Particle Physics group
2011-02-17