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Uncertainties on exclusive diffractive Higgs boson and jet production at the LHC Dechambre, Alice ; ; et al in Physical Review. D : Particles and Fields (2011), D83 Two theoretical descriptions of exclusive diffractive jets and Higgs production at the LHC were implemented into the FPMC generator: the Khoze, Martin, Ryskin model and the Cudell, Hern\'andez, Ivanov ... [more ▼] Two theoretical descriptions of exclusive diffractive jets and Higgs production at the LHC were implemented into the FPMC generator: the Khoze, Martin, Ryskin model and the Cudell, Hern\'andez, Ivanov, Dechambre exclusive model. We then study the uncertainties. We compare their predictions to the CDF measurement and discuss the possibility of constraining the exclusive Higgs production at the LHC with early measurements of exclusive jets. We show that the present theoretical uncertainties can be reduced with such data by a factor of 5. [less ▲] Detailed reference viewed: 9 (3 ULg)Quasi-Elastic Production at Hadronic Colliders Dechambre, Alice Book published by Les Editions de l'Université de Liège (2010) Quasi-elastic production is usually viewed as a golden signal for the detection of objects such as the Higgs boson(s) or exotic particles and this is due to the very clean final state and the lack of ... [more ▼] Quasi-elastic production is usually viewed as a golden signal for the detection of objects such as the Higgs boson(s) or exotic particles and this is due to the very clean final state and the lack of hadronic remnants after the interaction. In view of the recent data from CDF Run II, we critically re-evaluated the standard approach to the calculation of quasi-elastic cross sections in the high-energy limit and evaluated the uncertainties that affect this kind of process. The main idea of this work was to understand the various ingredients that enter the calculation and the uncertainties coming from each of them. We studied and narrowed down these uncertainties using available data on dijets quasi-elastic event at the TeVatron. All the arguments developed apply to high-mass central systems and lead to a prediction of the Higgs quasi-elastic cross section at the LHC energies. [less ▲] Detailed reference viewed: 64 (18 ULg)Exclusive diffractive Higgs and jet production at the LHC ; ; Dechambre, Alice et al in PoS - Proceedings of Science (2010, August 02), PoS DIS2010(PoS DIS2010), 087 The implementation of exclusive diffractive production of Higgs boson and dijets in the FPMC (Forward Physics Monte Carlo) framework is presented following the models by Khoze, Martin, Ryskin and Cudell ... [more ▼] The implementation of exclusive diffractive production of Higgs boson and dijets in the FPMC (Forward Physics Monte Carlo) framework is presented following the models by Khoze, Martin, Ryskin and Cudell, Dechambre, Hernandez and Ivanov. The predictions of the models are compared to the CDF measurement of exclusive jets and the uncertainties on the Higgs boson and jet production cross sections at the LHC are discussed. [less ▲] Detailed reference viewed: 22 (3 ULg)Quasi-Elastic Production at Hadronic Colliders Dechambre, Alice Doctoral thesis (2010) Quasi-elastic production is usually viewed as a golden signal for the detection of objects such as the Higgs boson(s) or exotic particles and this is due to the very clean final state and the lack of ... [more ▼] Quasi-elastic production is usually viewed as a golden signal for the detection of objects such as the Higgs boson(s) or exotic particles and this is due to the very clean final state and the lack of hadronic remnants after the interaction. In view of the recent data from CDF Run II, we critically re-evaluated the standard approach to the calculation of quasi-elastic cross sections in the high-energy limit and evaluated the uncertainties that affect this kind of process. The main idea of this work was to understand the various ingredients that enter the calculation and the uncertainties coming from each of them. We studied and narrowed down these uncertainties using available data on dijets quasi-elastic event at the TeVatron. All the arguments developed apply to high-mass central systems and lead to a prediction of the Higgs quasi-elastic cross section at the LHC energies. [less ▲] Detailed reference viewed: 13 (1 ULg)Higgs Exclusive Production Dechambre, Alice Poster (2009, August) Detailed reference viewed: 16 (2 ULg)Central exclusive production of dijets at hadronic colliders Cudell, Jean-René ; Dechambre, Alice ; et al in European Physical Journal C -- Particles & Fields (2009), 61(3), 369 In view of the recent diffractive dijet data from CDF run II, we critically re-evaluate the standard approach to the calculation of central production of dijets in quasi-elastic hadronic collisions. We ... [more ▼] In view of the recent diffractive dijet data from CDF run II, we critically re-evaluate the standard approach to the calculation of central production of dijets in quasi-elastic hadronic collisions. We find that the process is dominated by the non-perturbative region, and that even perturbative ingredients, such as the Sudakov form factor, are not under theoretical control. Comparison with data allows us to fix some of the uncertainties. Although we focus on dijets, our arguments apply to other high-mass central systems, such as the Higgs boson. [less ▲] Detailed reference viewed: 51 (13 ULg)Central Exclusive Dijet Production Dechambre, Alice ; Cudell, Jean-René ; Ivanov, Igor et al in AIP Conference Proceedings (2008), 1038 Detailed reference viewed: 23 (8 ULg)Aspects of diffractive physics: Introduction of non-perturbative effects Dechambre, Alice Master of advanced studies dissertation (2007) 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 ... [more ▼] 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. [less ▲] Detailed reference viewed: 22 (1 ULg) |
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