Postdoc at the Université de Liège
Ph.D. Thesis: (Advisor: J.R Cudell)
Abstract: Diffraction, or exclusive production, is usually view as a golden signal for the detection of objects as dijets, Higgs boson(s) or exotic particles, due to the very clean final state. This is why, we plan to critically re-evaluate the standard approach to the calculation of diffractive cross section in the high energy limit and evaluate the uncertainties that affect this kind of processes. The main question is the rate at wich such states can be produced, and we plan to study and narrow down the uncertainties using available data on dijets exclusive event at TEVATRON. All the arguments developped, apply to high-mass central systems and can lead to a prediction of the Higgs diffractive cross section at LHC.
Graduation: July 15, 2010
Physics laboratories and Travaux dirigés in Physics for Bachelors in Sciences, Life Sciences and Bachelors in Medicine.
Link to Physmed
Quantum Field Theory Tutorial:
19th Annual Joint Belgian-Dutch-German: Graduate School of Particle Physics, Spa, Belgium.
1. FPMC: a generator for forward physics, M. Boonekamp, A. Dechambre, V. Juranek, O. Kepka, M. Rangel, C. Royon, R. Staszewski, arXiv:1102.2531
2. Uncertainties on exclusive diffractive Higgs and jets production at the LHC, A. Dechambre, O. Kepka, C. Royon, R. Staszewski, Phys. Rev. D83 (2011) 054013, arXiv:1101.1439
3. Higgs Exclusive Production, J.R. Cudell, A. Dechambre, O. F. Hernández, arXiv:1011.3653
4. Central exclusive production of dijets at hadronic colliders, J.R. Cudell, A. Dechambre, O. F. Hernández, I. P. Ivanov, Eur. Phys. J. C61 (2009) 369, arXiv:0807.0600
5. Gribov Poles in Diffractive Physics, A. Dechambre, arXiv:0708.0352
Undergraduate Dissertation (2005):
Antimatter in the Univers in french
Advisor: Prof. J. Cugnon
Master's Thesis, DEA (2006):
Advisor: J-R. Cudell
Abstract: We think of this work as a basis, a kind of manual or short report on topics, tools and methods for diffractive high-energy calculations and as an example of what is possible to do, but also as a bridge to new approaches to the introduction of non-perturbative effects and to more complex calculation. We introduce the necessary ingredient to understand diffractive production. The first chapter is an introduction to cutting rules, Feynman diagrams and we shall see that the main part of the cross-section information is given by the imaginary part of these diagrams. After the introduction of our technique of calculation we come to the pomeron physics and introduce the approach of our futur calculation. The last subsection is devoted to the first step in the direction of the Higgs diffractive production, a two-loop diagram as a basis of our future works. The last chapter will contain an original result. We know that QCD has some problems especially with non-perturbative phenomena i.e. long-distance events. A long-time ago, Gribov introduced the idea of a modified gluon propagator that includes non-perturbative effects in the usual calculation of the amplitude. Then, we shall take this Gribov propagator and perform the calculation of the two-gluon exchange with it. We conclude by a review of the improvement needed in the calculation and the new aspects of the amplitude.
See my CV