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Constraints on dark matter annihilation from CMB observations before Planck

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Constraints on dark matter annihilation from CMB observations before Planck

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dc.contributor.author	López Honórez, Laura
dc.contributor.author	Mena Requejo, Olga
dc.contributor.author	Palomares Ruiz, Sergio
dc.contributor.author	Vincent, Aaron C.
dc.date.accessioned	2013-11-26T12:16:53Z
dc.date.available	2013-11-26T12:16:53Z
dc.date.issued	2013
dc.identifier.citation	Lopez-Honorez, L. Mena Requejo, Olga Palomares-Ruiz, S. Vincent, Aaron C. 2013 Constraints on dark matter annihilation from CMB observations before Planck Journal Of Cosmology And Astroparticle Physics 07 7 046
dc.identifier.uri	http://hdl.handle.net/10550/31433
dc.description.abstract	We compute the bounds on the dark matter (DM) annihilation cross section using the most recent Cosmic Microwave Background measurements from WMAP9, SPT'11 and ACT'10. We consider DM with mass in the MeV-TeV range annihilating 100% into either an e(+)e(-) or a mu(+)mu(-) pair. We consider a realistic energy deposition model, which includes the dependence on the redshift, DM mass and annihilation channel. We exclude the canonical thermal relic abundance cross section (<sigma nu > = 3 x 10(-26) cm(3)s(-1)) for DM masses below 30 GeV and 15 GeV for the e(+)e(-) and mu(+)mu(-) channels, respectively. A priori, DM annihilating in halos could also modify the reionization history of the Universe at late times. We implement a realistic halo model taken from results of state-of-the-art N-body simulations and consider a mixed reionization mechanism, consisting on reionization from DM as well as from first stars. We find that the constraints on DM annihilation remain unchanged, even when large uncertainties on the halo model parameters are considered.
dc.relation.ispartof	Journal Of Cosmology And Astroparticle Physics, 2013, vol. 07, num. 7, p. 046
dc.subject	Cosmologia
dc.subject	Astrofísica
dc.subject	Partícules (Física nuclear)
dc.title	Constraints on dark matter annihilation from CMB observations before Planck
dc.type	journal article	es_ES
dc.date.updated	2013-11-26T12:16:53Z
dc.identifier.doi	10.1088/1475-7516/2013/07/046
dc.identifier.idgrec	092074
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1088/1475-7516/2013/07/046