| Автор | Sean Bailly |
| Дата выпуска | 2011-03-01 |
| dc.description | We present supersymmetric scenarios with gravitino LSP and stau NLSP in the case of a non-standard model of cosmology with the addition of a dark component in the pre-BBN era. In the context of the standard model of cosmology, gravitino LSP has drawn quite some attention as it is a good candidate for dark matter. It is produced in scattering processes during reheating after inflation and from the decay of the stau. With a long lifetime, the stau decays during Big Bang Nucleosynthesis. It is strongly constrained by the abundance of light elements but can however address the known ``BBN lithium problem''. It requires fairly massive staus m<sub></sub>≳ 1TeV and puts an upper bound on the reheating temperature T<sub>R</sub> ≃ 10<sup>7</sup> GeV which does not satisfy the requirements for thermal leptogenesis. For the non-standard cosmological scenario, the reheating temperature bound can be strongly relaxed T<sub>R</sub> ≫ 10<sup>9</sup>GeV and the lithium-7 problem solved with a stau typical mass of m<sub></sub> ∼ 600–700 GeV and down to ∼ 400GeV with a very important dark component that could enable possible production and detection at the LHC. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Gravitino dark matter and the lithium primordial abundance within a pre-BBN modified expansion |
| Тип | paper |
| DOI | 10.1088/1475-7516/2011/03/022 |
| Electronic ISSN | 1475-7516 |
| Журнал | Journal of Cosmology and Astroparticle Physics |
| Том | 2011 |
| Первая страница | 22 |
| Последняя страница | 022 |
| Аффилиация | Sean Bailly; Laboratoire de Physique Théorique LAPTH, Université de Savoie, CNRS (UMR 5108), BP 110, F-74941 Annecy-Le-Vieux Cedex, France |
| Выпуск | 03 |
