2008/03/19 by Graciela Gelmini, Efunwande Osoba, Sergio Palomares-Ruiz +1
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Cosmic neutrino background #Cosmology #Cosmology and Gravitation Theories #Inflation (cosmology) #Neutrino #Neutrino Physics Research #Physics beyond the Standard Model #Standard Model (mathematical formulation) #Sterile neutrino #astro-ph #hep-ph
paper · pdf · doi:10.1088/1475-7516/2008/10/029
published as JCAP 0810:029,2008 · 14 pp, 7 figs
arxiv created 2008/03/19 · openalex publication_date 2008/10/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
It is commonly assumed that the cosmological and astrophysical bounds on the mixings of sterile with active neutrinos are much more stringent than those obtained from laboratory measurements. We point out that in scenarios with a very low reheating temperature MeV at the end of (the last episode of) inflation or entropy creation, the abundance of sterile neutrinos becomes greatly suppressed with respect to that obtained within the standard framework. Thus, in this case cosmological bounds become much less stringent than usually assumed, allowing sterile neutrinos to be 'visible' in future experiments. Here, we concentrate on massive (mostly sterile) neutrinos with masses m s >1 MeV for T RH ≤ m s .