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Gravitino dans l'Univers primordial : un modèle d'extra-dimension et de matière noire

Abstract : This work can be related to the Horava-Witten M-theory in which the Universe could appear 5 dimensional at a stage of its evolution but also to theories of Baryogenesis through Leptogenesis which imply high reheating temperatures after Inflation. The studied cosmological model is within the framework of a 5 dimensional supergravity with the extra -dimension compactified on an orbifolded circle, where the matter and gauge field are located on one of the two branes localised at the orbifold fixed points and where the supergravity fields can propagate in the whole spatial dimensions. In the model, the Dark matter is made of neutralino which is supposed to be the lightest supersymmetric particle. We have shown that there are curves of constraints between the size of the extra-dimension and the reheating temperature of the Universe after Inflation. The constraints come from the measurements of the amount of Dark matter in the Universe and from the model of the Big Bang Nucleosynthesis of light elements.
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Submitted on : Thursday, May 29, 2008 - 3:42:18 PM
Last modification on : Tuesday, November 19, 2019 - 2:43:57 AM
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  • HAL Id : tel-00283293, version 1



David Gherson. Gravitino dans l'Univers primordial : un modèle d'extra-dimension et de matière noire. Physique mathématique [math-ph]. Université Claude Bernard - Lyon I, 2007. Français. ⟨tel-00283293⟩



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