Quintessence and the Relic Density of Neutralinos
| dc.creator | Salati, Pierre | |
| dc.date | 2002-07-18 | |
| dc.date | 2003-09-05 | |
| dc.date.accessioned | 2026-07-07T10:31:17Z | |
| dc.date.available | 2026-07-07T10:31:17Z | |
| dc.description | The archetypal model for the recently discovered dark energy component of the universe is based on the existence of a scalar field whose dynamical evolution comes down today to a non-vanishing cosmological constant. In the past - before big-bang nucleosynthesis for that matter - that scalar field could have gone through a period of kination during which the universe has expanded at a much higher pace than what is currently postulated in the standard radiation dominated cosmology. I examine here the consequences of such a period of kination on the relic abundance of neutralinos and find that the latter could be much higher - by three orders of magnitude - than what is estimated in the canonical derivation. I shortly discuss the implications of this scenario for the dark matter candidates and their astrophysical signatures. This new version contains a discussion - see section 2 - of the overshooting problem and offers perspectives to reconcile an initial period of violent kination with the existence of a cosmological constant today. | |
| dc.description | Latex 12 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0207396 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0207396 | |
| dc.identifier | Phys.Lett.B571:121-131,2003 | |
| dc.identifier | doi:10.1016/j.physletb.2003.07.073 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178357 | |
| dc.subject | Astrophysics | |
| dc.title | Quintessence and the Relic Density of Neutralinos | |
| dc.type | text |