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Etudes phénoménologiques au-delà du Modèle Standard

Abstract : The Standard Model of particle physics has been remarkably tested at colliders up to an energy of the order of the TeV. However, a large number of questions remain unanswered. For instance, the Standard Model does not explain the matter-antimatter asymetry, nor the sixteen orders of magnitude separating the electroweak and the Planck scales. Moreover, electroweak and strong interactions are not unified and gra- vity is not taken into account. The aim of this thesis is to study various phenomenological aspects of extensions of the Standard Model. The first part is devoted to electroweak baryogenesis in the Minimal Supersymmetric Standard Model and more specifically on the dynamics of the electroweak phase transistion. The second chapter deals with the problem of spontaneous supergravity breaking in effective string theories which are the most promising candidates for a unified description of gravitational interactions with other fundamental forces. Finally, in the last chapter, we discuss various phenomenological models using properties of branes and the existence of extra dimensions in order to reformulate the gauge hierarchy problem in geometrical terms
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Contributor : Marc Gingold <>
Submitted on : Tuesday, October 16, 2001 - 12:00:00 AM
Last modification on : Wednesday, September 12, 2018 - 2:13:57 PM
Long-term archiving on: : Friday, April 2, 2010 - 7:49:13 PM


  • HAL Id : tel-00000824, version 1



Géraldine Servant. Etudes phénoménologiques au-delà du Modèle Standard. Physique mathématique [math-ph]. Université Paris Sud - Paris XI, 2001. Français. ⟨tel-00000824⟩



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