Heavy sterile neutrinos: Bounds from big-bang nucleosynthesis and SN 1987A

Abstract

Cosmological and astrophysical effects of heavy (10 - 200 MeV) sterile Dirac neutrinos, mixed with the active ones, are considered. The bounds on mass and mixing angle from both supernovae and big-bang nucleosynthesis are presented.

19 pages, 5 figures, 1 table. Some references added

References in corpus (1)

• Cosmological and astrophysical bounds on a heavy sterile neutrino and the KARMEN anomaly

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