Astrophysics and cosmology confront the 17 keV neutrino

Details Astrophysics and cosmology confront the 17 keV neutrino Astrophysics and cosmology confront the 17 keV neutrino

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9122981k&link_type=abstract

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Astronomy and Astrophysics

Astrophysics

Astrophysics, Cosmology, Neutrinos, Nuclear Fusion, Mass, Particle Accelerators

Scientific paper

A 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.

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