Astrophysics and cosmology confront the 17-keV neutrino

1 July 1991

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 67 (1) , 5-8
https://doi.org/10.1103/physrevlett.67.5

Abstract

Astrophysical and cosmological arguments constrain the properties of a 17-keV Dirac neutrino. It must have interactions beyond those of the standard electroweak theory to reduce its cosmic abundance by a factor of 200. A predicament arises because the additional helicity states of the neutrino necessary to construct a Dirac mass must have interactions strong enough to evade the astrophysical bound from SN 1987A, but weak enough to avoid violating the bound from primordial nucleosynthesis.

Keywords

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