Cosmic Dark Radiation and Neutrinos

Cosmic Dark Radiation and Neutrinos

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Cosmic Dark Radiation and Neutrinos

Show simple item record Archidiacono, Maria Giusarma, Elena Hannestad, S. Mena Requejo, Olga 2014-07-24T09:54:32Z 2014-07-24T09:54:32Z 2013
dc.description.abstract New measurements of the cosmic microwave background (CMB) by the Planck mission have greatly increased our knowledge about the universe. Dark radiation, a weakly interacting component of radiation, is one of the important ingredients in our cosmological model which is testable by Planck and other observational probes. At the moment, the possible existence of dark radiation is an unsolved question. For instance, the discrepancy between the value of the Hubble constant, H-0, inferred from the Planck data and local measurements of H-0 can to some extent be alleviated by enlarging the minimal ACDM model to include additional relativistic degrees of freedom. From a fundamental physics point of view, dark radiation is no less interesting. Indeed, it could well be one of the most accessible windows to physics beyond the standard model, for example, sterile neutrinos. Here, we review the most recent cosmological results including a complete investigation of the dark radiation sector in order to provide an overview of models that are still compatible with new cosmological observations. Furthermore, we update the cosmological constraints on neutrino physics and dark radiation properties focusing on tensions between data sets and degeneracies among parameters that can degrade our information or mimic the existence of extra species.
dc.language.iso eng
dc.relation.ispartof Advances In High Energy Physics, 2013, vol. 2013, p. 191047
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Archidiacono, Maria Giusarma, Elena Hannestad, S. Mena Requejo, Olga 2013 Cosmic Dark Radiation and Neutrinos Advances In High Energy Physics 2013 191047
dc.subject Física
dc.title Cosmic Dark Radiation and Neutrinos
dc.type info:eu-repo/semantics/article 2014-07-24T09:54:32Z
dc.identifier.idgrec 093161

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