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Asymmetric Dark Matter and Dark Radiation

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Asymmetric Dark Matter and Dark Radiation

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dc.contributor.author	Blennow, Mattias
dc.contributor.author	Fernández Martínez, Enrique
dc.contributor.author	Mena Requejo, Olga
dc.contributor.author	Redondo, Javier
dc.contributor.author	Serra, Paolo
dc.date.accessioned	2014-07-24T10:14:18Z
dc.date.available	2014-07-24T10:14:18Z
dc.date.issued	2012
dc.identifier.citation	Blennow, Mattias Fernández Martínez, Enrique Mena Requejo, Olga Redondo, Javier Serra, Paolo 2012 Asymmetric Dark Matter and Dark Radiation Journal Of Cosmology And Astroparticle Physics 07 7 022
dc.identifier.uri	http://hdl.handle.net/10550/37300
dc.description.abstract	Asymmetric Dark Matter (ADM) models invoke a particle-antiparticle asymmetry, similar to the one observed in the Baryon sector, to account for the Dark Matter (DM) abundance. Both asymmetries are usually generated by the same mechanism and generally related, thus predicting DM masses around 5 GeV in order to obtain the correct density. The main challenge for successful models is to ensure efficient annihilation of the thermally produced symmetric component of such a light DM candidate without violating constraints from collider or direct searches. A common way to overcome this involves a light mediator, into which DM can efficiently annihilate and which subsequently decays into Standard Model particles. Here we explore the scenario where the light mediator decays instead into lighter degrees of freedom in the dark sector that act as radiation in the early Universe. While this assumption makes indirect DM searches challenging, it leads to signals of extra radiation at BBN and CMB. Under certain conditions, precise measurements of the number of relativistic species, such as those expected from the Planck satellite, can provide information on the structure of the dark sector. We also discuss the constraints of the interactions between DM and Dark Radiation from their imprint in the matter power spectrum.
dc.language.iso	eng
dc.relation.ispartof	Journal Of Cosmology And Astroparticle Physics, 2012, vol. 07, num. 7, p. 022
dc.subject	Cosmologia
dc.title	Asymmetric Dark Matter and Dark Radiation
dc.type	journal article	es_ES
dc.date.updated	2014-07-24T10:14:18Z
dc.identifier.doi	10.1088/1475-7516/2012/07/022
dc.identifier.idgrec	084364
dc.rights.accessRights	open access	es_ES