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Cosmological radiation density with non-standard neutrino-electron interactions

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Cosmological radiation density with non-standard neutrino-electron interactions

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dc.contributor.author	Fernández de Salas, Pablo
dc.contributor.author	Gariazzo, Stefano
dc.contributor.author	Martínez-Miravé, Pablo
dc.contributor.author	Pastor Carpi, Sergio
dc.contributor.author	Tórtola Baixauli, María Amparo
dc.date.accessioned	2022-05-03T13:31:44Z
dc.date.available	2022-05-03T13:31:44Z
dc.date.issued	2021
dc.identifier.citation	Fernández de Salas, Pablo Gariazzo, Stefano Martínez-Miravé, Pablo Pastor Carpi, Sergio Tórtola Baixauli, María Amparo 2021 Cosmological radiation density with non-standard neutrino-electron interactions Physics Letters B 820 136508-1 136508-9
dc.identifier.uri	https://hdl.handle.net/10550/82538
dc.description.abstract	Neutrino non-standard interactions (NSI) with electrons are known to alter the picture of neutrino decoupling from the cosmic plasma. NSI modify both flavour oscillations through matter effects, and the annihilation and scattering between neutrinos and electrons and positrons in the thermal plasma. In view of the forthcoming cosmological observations, we perform a precision study of the impact of non-universal and flavour-changing NSI on the effective number of neutrinos, Neff. We present the variation of Neff arising from the different NSI parameters and discuss the existing degeneracies among them, from cosmology alone and in relation to the current bounds from terrestrial experiments. Even though cosmology is generally less sensitive to NSI than these experiments, we find that future cosmological data would provide competitive and complementary constraints for some of the couplings and their combinations.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 2021, vol. 820 , p. 136508-1-136508-9
dc.subject	Cosmologia
dc.subject	Física
dc.title	Cosmological radiation density with non-standard neutrino-electron interactions
dc.type	journal article	es_ES
dc.date.updated	2022-05-03T13:31:45Z
dc.identifier.doi	10.1016/j.physletb.2021.136508
dc.identifier.idgrec	149432
dc.rights.accessRights	open access	es_ES