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Dechambre Alice

From IFPA wiki


Postdoc at the Université de Liège

Ph.D. Thesis: (Advisor: J.R Cudell)

Quasi-Elastic Production at Hadronic Colliders

 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


Assistant teacher:

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.


  • Phenomenology of High Energy Physics
  • Quantum Field Theory
  • Astroparticles
  • General Relativity and Cosmology


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

Prior research in Physics

Undergraduate Dissertation (2005):

Antimatter in the Univers in french

Advisor: Prof. J. Cugnon


Master's Thesis, DEA (2006):

Aspects of Diffractive Physics, Introduction of Non-perturbative effects

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.

Curriculum Vitae

See my CV



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