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Astrophysics and cosmology confront the 17-keV neutrinoA host of astrophysical and cosmological arguments severely constrain the properties of a 17 keV Dirac neutrino. Such a neutrino must have interactions beyond those of the standard electroweak theory to reduce its cosmic abundance (through decay or annihilation) by a factor of two hundred. 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.
Document ID
19910058668
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kolb, Edward W.
(NASA Lewis Research Center Cleveland, OH, United States)
Turner, Michael S.
(NASAFermilab Astrophysics Center Batavia; Chicago, University, IL, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1991
Publication Information
Publication: Physical Review Letters
Volume: 67
ISSN: 0031-9007
Subject Category
Astrophysics
Accession Number
91A43291
Funding Number(s)
CONTRACT_GRANT: NAGW-1340
Distribution Limits
Public
Copyright
Other

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