Is a massive tau neutrino just what cold dark matter needs
Journal Article
·
· Physical Review Letters; (United States)
- NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States) Department of Physics, The University of Chicago, Chicago, Illinois 60637-1433 (United States) Department of Astronomy Astrophysics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States)
The cold dark matter scenario for structure formation in the Universe has many successes; however, when its spectrum of density perturbations is normalized to the Cosmic Background Explorer anisotropy measurement the level of inhomogeneity predicted on small scales is too large. This can be remedied by a tau neutrino of mass 1--10 MeV and lifetime 0.1--100 sec whose decay products include electron neutrinos because it allows the total energy density in relativistic particles to be doubled without interfering with nucleosynthesis.
- OSTI ID:
- 7296123
- Journal Information:
- Physical Review Letters; (United States), Vol. 72:24; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
UNIVERSE
TAU NEUTRINOS
ANISOTROPY
ELECTRON NEUTRINOS
ENERGY DENSITY
ENERGY SPECTRA
NUCLEOSYNTHESIS
ELEMENTARY PARTICLES
FERMIONS
HEAVY LEPTONS
LEPTONS
MASSLESS PARTICLES
NEUTRINOS
POSTULATED PARTICLES
SPECTRA
SYNTHESIS
662430* - Properties of Leptons- (1992-)
UNIVERSE
TAU NEUTRINOS
ANISOTROPY
ELECTRON NEUTRINOS
ENERGY DENSITY
ENERGY SPECTRA
NUCLEOSYNTHESIS
ELEMENTARY PARTICLES
FERMIONS
HEAVY LEPTONS
LEPTONS
MASSLESS PARTICLES
NEUTRINOS
POSTULATED PARTICLES
SPECTRA
SYNTHESIS
662430* - Properties of Leptons- (1992-)