Sterile neutrinos in the electronvolt mass range are hinted at by a number of terrestrial neutrino experiments. However, such neutrinos are highly incompatible with data from the cosmic microwave background and large scale structure. This paper discusses how charging sterile neutrinos under a new pseudoscalar interaction can reconcile eV sterile neutrinos with cosmological data. We show that this model provides a fit to all available data which is way better than the standard. cold dark matter model with one additional fully thermalized sterile neutrino. In particular it also prefers a value of the Hubble parameter much closer to the locally measured value.
Sterile neutrinos with pseudoscalar self-interactions and cosmology / M. Archidiacono, S. Hannestad, R. Hansen, T. Tram. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:4(2016), pp. 045004.1-045004.7.
Sterile neutrinos with pseudoscalar self-interactions and cosmology
M. Archidiacono;
2016
Abstract
Sterile neutrinos in the electronvolt mass range are hinted at by a number of terrestrial neutrino experiments. However, such neutrinos are highly incompatible with data from the cosmic microwave background and large scale structure. This paper discusses how charging sterile neutrinos under a new pseudoscalar interaction can reconcile eV sterile neutrinos with cosmological data. We show that this model provides a fit to all available data which is way better than the standard. cold dark matter model with one additional fully thermalized sterile neutrino. In particular it also prefers a value of the Hubble parameter much closer to the locally measured value.File | Dimensione | Formato | |
---|---|---|---|
PhysRevD.93.045004.pdf
accesso aperto
Tipologia:
Publisher's version/PDF
Dimensione
563.22 kB
Formato
Adobe PDF
|
563.22 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.