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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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.uri http://dx.doi.org/10.1088/1475-7516/2013/07/046
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.rights.uri info:eu-repo/semantics/openAccess
dc.source 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.subject Cosmologia
dc.subject Astrofísica
dc.subject Partícules (Física nuclear)
dc.title Constraints on dark matter annihilation from CMB observations before Planck
dc.type info:eu-repo/semantics/article
dc.date.updated 2013-11-26T12:16:53Z
dc.identifier.doi http://dx.doi.org/10.1088/1475-7516/2013/07/046
dc.identifier.idgrec 092074

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