More is different: Reconciling eV sterile neutrinos with cosmological mass bounds
It is generally expected that adding light sterile species would increase the effective number of neutrinos, Neff. In this paper we discuss a scenario that Neff can actually decrease due to the neutrino oscillation effect if sterile neutrinos have self-interactions. We specifically focus on the eV m...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-11-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315006930 |